Oppenheimer is a film written and directed by Christopher Nolan. It stars Cillian Murphy as J. Robert Oppenheimer, the American physicist who led the development of the atomic bomb during World War II. The film was released in July 2023 and received critical acclaim for its screenplay, score, visuals, and cast performances. Its simultaneous release with Warner Bros.'s Barbie led to the Barbenheimer cultural phenomenon, which encouraged audiences to see both films as a double feature. The film grossed over $955 million worldwide, becoming the third-highest-grossing film of 2023, the highest-grossing World War II-related film, the highest-grossing biographical film, and the second-highest-grossing R-rated film. Oppenheimer garnered numerous accolades, including five Golden Globe Awards, and was named one of the top-ten films of 2023 by the National Board of Review and the American Film Institute.