Young Sheldon is an American sitcom television series created by Chuck Lorre and Steven Molaro that aired on CBS from September 25, 2017, to May 16, 2024. A spin-off and prequel to The Big Bang Theory, the series is set from the late 1980s to the mid-1990s and follows the childhood of Sheldon Cooper, gifted young prodigy growing up with his family in Medford, Texas. The show stars Iain Armitage as Sheldon, alongside Zoe Perry, Lance Barber, Montana Jordan, Raegan Revord, and Annie Potts among many others. Jim Parsons, who portrayed the adult Sheldon Cooper on The Big Bang Theory, serves as the series' narrator and an executive producer.
Development of the prequel began in November 2016, based on an idea Parsons shared with The Big Bang Theory producers. By March 2017, Armitage and Perry were cast, and CBS ordered the series. Young Sheldon premiered as a special preview on September 25, 2017, and was picked up for a full season that began airing on November 2, 2017. In November 2023, CBS announced that the series would conclude after its seventh season. The one-hour series finale aired on May 16, 2024. The series received positive reviews from critics.
In January 2024, it was announced that a spin-off series focused on Georgie Cooper and Mandy McAllister was in development. By March 2024, CBS had greenlit the series, titled Georgie & Mandy's First Marriage, which premiered on October 17, 2024.
Plot
Seasons 1–3 (1989–1991)
The series opens in the fall of 1989 with nine-year-old Sheldon Cooper beginning high school as a freshman at Medford High School in East Texas. As a child prodigy with an exceptional intellect, Sheldon struggles to fit in socially while excelling academically. His family dynamics are central to early storylines: his devoutly religious mother Mary often clashes with his scientific skepticism, while his father George Sr. attempts to understand his son despite their intellectual differences. Sheldon's relationship with his twin sister Missy is characterized by typical sibling rivalry, though they maintain a close bond, while his older brother Georgie often feels overshadowed by the attention Sheldon receives.
Throughout these seasons, Sheldon begins his college education by auditing physics classes taught by Dr. John Sturgis at East Texas Tech College. His grandmother Constance Tucker (also known as Connie and Meemaw), who calls him "Moonpie," whom he calls "Meemaw" serves as one of his strongest advocates and begins a romantic relationship with Dr. Sturgis. The family faces various challenges, including financial struggles and George Sr.'s demanding coaching schedule. Sheldon's social development is explored through his friendship with Tam Nguyen, a Vietnamese-American classmate who introduces him to comic books and role-playing games such as Dungeons & Dragons. The series also introduces Paige Swanson, another child prodigy who serves as both a friend and academic rival to Sheldon.
Seasons 4 & 5 (1991–1993)
As Sheldon graduates high school at age eleven as Medford High's valedictorian, he transitions to full-time college attendance at East Texas Tech in fall 1991. The series explores more complex family dynamics and character development during this period. Dr. Sturgis experiences a mental health crisis that strains his relationship with Connie and temporarily disrupts Sheldon's academic progress. George Sr. faces increasing pressure as head football coach in Medford High School while dealing with marital tensions with Mary, who becomes attracted to a youth pastor at their church named Pastor Rob. These developments create much emotional turmoil within the Cooper household.
Georgie begins showing signs of maturity as he enters his late teens, though he continues to struggle academically and eventually drops out of high school at age seventeen to work full-time. His decision creates family conflict but also demonstrates his natural sales abilities. Meanwhile, Missy navigates typical adolescent challenges while maintaining her role as Sheldon's emotional anchor. Sheldon's college experience introduces new challenges as he encounters peers and professors who don't always accommodate his unique personality and needs. During this period, Georgie meets Mandy McAllister, who's around 12 years older than he is, and their relationship becomes serious despite the significant age difference. The age difference was greater than either knew at the start; Mandy, twenty-nine years old, claimed to be twenty-five when they met, while Georgie, seventeen, claimed to be twenty-one.
Seasons 6 & 7 (1993–1994)
The final seasons focus on major life transitions and family upheaval as the series approaches its conclusion. Georgie's relationship with Mandy becomes central to the family's story when she becomes pregnant with his child. The couple later gets married, and Mandy gives birth to their daughter Constance, nicknamed "CeeCee" after Meemaw, in early 1993. This development forces both Georgie and the Cooper family to confront adult responsibilities and consequences.
George Sr.'s health becomes a growing concern throughout the seventh season. The family deals with various stressors, including the aftermath of a tornado that forces extended family members to temporarily live together. George Sr. receives an offer for a prestigious coaching position at Rice University in Houston, which would require the family to relocate. However, before he can accept the opportunity, George Sr. suffers a fatal heart attack while at work in season seven, episode twelve. The off-screen death occurs as the family waits for him to return home for a planned family photograph, leaving Mary, Meemaw, and the children to cope with the sudden loss.
The series concludes with Sheldon's academic achievements leading to his acceptance at the California Institute of Technology for graduate studies. At age fourteen, he makes the difficult decision to leave his grieving family in Texas and move to California to pursue his scientific career. The finale depicts adult Sheldon composing his childhood memoir and reflecting on the past, with appearances from his wife Amy and allusions to their children, providing closure to Sheldon's formative years while connecting to his future as established in The Big Bang Theory.
Cast and characters
Main
Iain Armitage as Sheldon Lee Cooper, a child prodigy well versed in various branches of mathematics and science. He states that he decided to pursue physics around the same time as the show begins. While academically gifted, Sheldon lacks a full understanding of social cues and behaviors. He often shows a sense of superiority over everyone, which leads him to be oblivious to the effect on other people, including his family. Nevertheless, Sheldon has proven to love his family. He is Georgie's younger brother and Missy's fraternal older twin brother. He begins attending high school at age nine and college full-time at age 11, then earns his undergraduate degree and moves to California at age 14 in the final episode, where he begins his graduate studies at Caltech, his future employer. Armitage appears as part of videotaped footage playing the character in The Big Bang Theory through an episode in the final season.
Jim Parsons is the voice of adult Sheldon Cooper (and also Sheldon Cooper in The Big Bang Theory), who provides the perspective of an adult recalling his childhood. Given a host of retroactive continuity issues explored within the series, he has since been considered an unreliable narrator by some observers.
Parsons also physically reprises his role as adult Sheldon in the series finale, where he is revealed to have been writing his memoir. Years after the finale of The Big Bang Theory, he now lives in suburban Los Angeles with his wife, Amy Farrah Fowler, their son Leonard, and their daughter.
Zoe Perry as Mary Cooper (née Tucker), mother of Sheldon, Missy, and Georgie, and wife to George Sr. She is strict and overprotective of her children, and she worries about them because of her own troubled past. She is a devout Southern Baptist, working at her local church, and often objects to Sheldon's atheism. Nevertheless, she deeply loves her son and wants to protect him for as long as she can. Perry's mother, Laurie Metcalf, played Mary on The Big Bang Theory.
Lance Barber as George Cooper Sr., father of Sheldon, Missy, and Georgie; a Vietnam veteran and the head football coach at Medford High. George does not share Sheldon's intellect, which sometimes leads others, especially Meemaw, to question his genetic relationship to Sheldon. He is often at odds with his children and particularly struggles to understand Sheldon, but he does try to be a caring and responsible father. He often gets criticism by Mary on his alcohol intake. In the episodes leading up to the series finale, he is offered a prestigious football coaching job at Rice University, but dies of a heart attack shortly afterward. Barber appeared in a Season 5 episode of The Big Bang Theory as one of adult Sheldon's future roommate Leonard Hofstadter's high school bullies, Jimmy Speckerman, before making an appearance via a 1990s videotape as his Young Sheldon character in a final season episode.
Montana Jordan as George Marshall "Georgie" Cooper Jr., older brother of Sheldon and Missy, and husband to Mandy. Georgie resents the attention his parents, especially his mother, pay to Sheldon. He does not do well at school and gets mocked and teased for it by the rest of the family, particularly Sheldon and Meemaw. He does not get along well with Sheldon and is tired of being compared to him. He attends Medford High with Sheldon and plays on the school's football team. At age 17, he drops out of school to work full-time and discovers a talent for sales that will lead him to become the wealthy owner of a tire store chain in The Big Bang Theory, on which he is played by Jerry O'Connell, appearing in the final portions of the penultimate season for Sheldon's wedding. In season 5, he becomes attracted to a weather forecaster named Mandy who is 12 years older than him, and unintentionally gets her pregnant. He starts acting more maturely and responsibly as he goes forward with raising their child and marrying her.
Raegan Revord as Melissa "Missy" Cooper, younger sister of George Jr, and younger twin sister of Sheldon. She teases Sheldon along with Georgie, but not as much. She does not share Sheldon's intelligence, but is very perceptive. Missy sometimes feels ignored or left out by her mother by all the attention Mary gives Sheldon. Occasionally, she does not get along with Sheldon, but she finds in her twin brother a solid confidant and has admitted to not feeling as whole without him. She also shows love for her brother even though she constantly denies it. She is depicted as a popular girl in school with many friends, and has a history of boyfriends, including Marcus Larson played by London Cheshire. She discovers her talent for baseball in Season 3, when she asks her father to play with her. Courtney Henggeler plays adult Missy on The Big Bang Theory, appearing twice: once in the first season during a visit to Sheldon's place where his roommates flirt with her for attention, and the other time in the penultimate season finale for his wedding, when she meets his future wife Amy.
Annie Potts as Constance "Connie" Tucker, maternal grandmother of Sheldon, Missy, and Georgie, who refer to her as "Meemaw". She is a fun-loving woman who can be sarcastic and often mocks those around her, especially her son-in-law George. On the other hand, she is patient with and sometimes struggles to understand Sheldon, whom she affectionately calls "Moonpie", and advises Mary to trust that Sheldon will find his way. In the fourth season, she is said to be around 68. June Squibb plays old Connie in The Big Bang Theory.
Matt Hobby as Pastor Jeff Difford (seasons 3–7; recurring seasons 1 & 2), the upbeat pastor at the Cooper family's Baptist church. Like Mary, he too sometimes has friction with Sheldon's irreligious side and often challenges Sheldon to explore their line of thought through logic exercises.
Wyatt McClure as William "Billy" Sparks (seasons 5–7; recurring seasons 1–4), the seemingly slow-witted son of Cooper family neighbors Herschel and Brenda Sparks. The pilot episode depicts him as Sheldon's nemesis, but he becomes much friendlier early in the series. He has an unrequited crush on Missy.
Emily Osment as Amanda "Mandy" Elizabeth McAllister (seasons 6 & 7; recurring season 5), a weather forecaster and waitress about 12 years older than Georgie, with whom she has a daughter they name after Connie, nicknaming her "CeeCee", before they are later married in season 7.
Recurring
Wallace Shawn as John Sturgis, a college physics professor whose class Sheldon attends as his first college course. He dates Meemaw with Sheldon's encouragement in seasons 1 through 3. He ends their relationship after having a mental breakdown and spending some time in a psychiatric hospital. After being fired from a post working with a hadron super collider, he works for a grocery store from late season 4 to early season 5 and gets fired again before returning to the university. Sheldon says he is the only adult who understands him and often refers to him as his mentor.
Ryan Phuong as Tam Nguyen (seasons 1–4 & 7), Sheldon's Vietnamese-American childhood best friend and classmate. Tam introduces Sheldon to many of his non-scientific interests, including comic books and role playing games. Robert Wu plays adult Tam on The Big Bang Theory.
Billy Gardell as Herschel Sparks (seasons 1 & 2), Billy's father and Brenda's husband, who owns a garage and divorces his wife in season 4. In season 7, he is stated to have moved to New Jersey and now has a non-existent relationship with his son.
Melissa Peterman as Brenda Sparks, Billy's mother, Herschel's wife until season 4, and Mary's initial nemesis and eventual friend, who works at the bowling alley frequented by Meemaw.
Doc Farrow as Assistant Coach Wayne Wilkins, Sheldon's P.E. teacher and the former assistant, now head football coach at Medford High. He was originally going to be called "Roy", but was named "Wayne" as of the episode "Spock, Kirk, and Testicular Hernia".
Valerie Mahaffey as Victoria MacElroy (seasons 1–3), Sheldon's homeroom and English teacher at Medford High.
Danielle Pinnock as Evelyn Ingram (seasons 1–4), Sheldon's math teacher at Medford High.
Brian Stepanek as Hubert Givens, Sheldon's science teacher at Medford High.
Rex Linn as Tom Petersen, the principal of Medford High.
Sarah Baker as Cheryl Hutchins, the Medford High librarian.
Jason Alexander as Gene Lundy (seasons 1–5), Medford High School's resident drama teacher.
Nancy Linehan Charles as Peg (seasons 1–5 & 7), Pastor Jeff's chain-smoking secretary.
Chris Wylde as Glenn (seasons 1–3), the owner of the comic bookstore King Kong Comics.
Isabel May as Veronica Duncan (seasons 2 & 3), Georgie's Halloween date who is introduced in "Seven Deadly Sins and a Small Carl Sagan". Initially a delinquent from a troubled household, she becomes a Christian after witnessing the "lust" room in Mr. Lundy's haunted house and loses interest in Georgie, who continues trying to win her over. She starts liking Georgie but backs off after he starts dating Jana.
Ed Begley Jr. as Dr. Grant Linkletter (seasons 2–7), a colleague and friendly rival of Dr. Sturgis. He regularly pursues Connie but is continually rebuffed.
Mckenna Grace as Paige Swanson (seasons 2–6), a child prodigy who treats Sheldon as a friend but whom Sheldon views as a rival, although he shows some empathy when she explains her difficult living situation at home.
Andrea Anders as Linda Swanson (seasons 2–4 & 6), Paige's mother.
Mary Grill as Officer Robin (seasons 2, 3 & 7), Pastor Jeff's second wife, who works as a police officer.
Craig T. Nelson as Dale Ballard (seasons 3–7), Missy's baseball coach and Meemaw's new boyfriend after Dr. Sturgis breaks up with her; he owns a sporting goods store and hires Georgie and George to work there.
Reba McEntire as June (seasons 3–5 & 7), Dale's ex-wife, the local hairdresser whom Meemaw befriends.
Ava Allan as Jana Owens (seasons 3–5), Georgie's girlfriend after he gives up pursuing Veronica. They break up over Georgie's decision to drop out of school.
London Cheshire as Marcus Larson (seasons 3–4), Missy's boyfriend.
Wendie Malick as President Linda Hagemeyer (seasons 4–7), the president of the East Texas Tech, Sheldon's university.
Dan Byrd as Pastor Rob (seasons 5 & 6), a young, unorthodox pastor hired by Pastor Jeff to teach Sunday school. He and Mary appear to become mutually interested in one another during the fifth season, which upsets George.
Caleb Emery as Darren (season 5), one of Sheldon's new college dormitory neighbors who shares an interest in video games along with Oscar and Sheldon.
Ivan Mok as Oscar (season 5), one of Sheldon's college dormitory neighbors who shares an interest in video games along with Darren and Sheldon.
Rachel Bay Jones as Audrey McAllister (seasons 6 & 7), Mandy's mother
Will Sasso as Jim McAllister (seasons 6 & 7), Mandy's father, who owns an auto service shop specializing in tires, which Georgie will eventually take over and transform into the Dr. Tire store chain in The Big Bang Theory.
Sofia Rosinsky as Tonya (season 6), Pastor Jeff's niece.
Guest
John Hartman as Dr. Jeremy Goetsch, the psychiatrist Sheldon sees when he has phagophobia and when he loses at the Medford High science fair.
Ray Liotta as Vincent, Meemaw's bookie.