Barbenheimer was a cultural phenomenon that preceded and surrounded the simultaneous theatrical release of two major studio films—Barbie by Warner Bros. Pictures and Oppenheimer by Universal Pictures—on July 21, 2023. The dichotomy between Barbie, a fantasy comedy directed by Greta Gerwig based on the fashion doll Barbie, and Oppenheimer, a biographical thriller directed by Christopher Nolan based on the life of theoretical physicist and creator of the atomic bomb, J. Robert Oppenheimer, sparked widespread online engagement. This included the creation of memes, merchandise, and themed content across social media.