‘Oppenheimer’ Cast and Character Guide: Who’s Who in Christopher Nolan’s Historical Epic

Christopher Nolan’s Oppenheimer is a biopic about J. Robert Oppenheimer, the inventor of the atomic bomb. Oppenheimer features one of the most impressive casts. Everything you need to know about Oppenheimer.

Cillian Murphy as J. Robert Oppenheimer

Cillian Murphy leads the film as the character, J. Robert Oppenheimer, father of the atomic bomb, is a central player in the Manhattan Project during World War II.

Emily Blunt as Katherine “Kitty” Oppenheimer

Emily Blunt will play Katherine Oppenheimer, the wife of Cillian Murphy’s character. We don’t know how big Blunt’s role will be in the upcoming film, we expect it to be a significant role considering her connection to Robert Oppenheimer.

Matt Damon as Leslie Groves

Matt Damon was earlier in Christopher Nolan’s Interstellar. Oppenheimer is the first time the two reunited since the 2014 epic. Damon will be playing Lt. Leslie Groves, who directed the Manhattan Project. Damon is an incredibly talented actor. 

Robert Downey Jr. as Lewis Strauss

The actor will play Lewis Strauss, a businessman, philanthropist, and naval officer who served two terms on the U.S. Atomic Energy Commission.

Florence Pugh as Jean Tatlock

In the film, Pugh will play Jean Tatlock, a psychiatrist and romantic interest for Robert Oppenheimer. At only 26 years old, Pugh has already established herself as a household name, and Oppenheimer will only add to her extensive resume.

Dylan Arnold as Frank Oppenheimer

Frank Oppenheimer is the younger brother of Robert Oppenheimer. Dylan Arnold will bring the physics professor to life in the upcoming film.

Emma Dumont as Jackie Oppenheimer

Emma Dumont is set to play Jackie Oppenheimer, the wife of Jack (Dylan Arnold) and sister-in-law of Robert Oppenheimer (Cillian Murphy).