Christopher Nolan has added "Pearl Harbor" star Josh Hartnett to the cast of his next directorial venture Oppenheimer. The Universal Pictures project is a biopic of J Robert Oppenheimer, the theoretical physicist remembered as one of the fathers of the atom bomb. Sources told Deadline, Hartnett is the latest addition to the bevy of stars already starring in the film. Details of his character are unknown at this time. Alone Today: Danny Trejo, Shannon Elizabeth, Frank Whaley Joins the Cast of Former Law Enforcement Official Wendy Wilkins Directorial.

Previously announced cast includes Cillian Murphy, who is set to star in the title role, Emily Blunt, Matt Damon, Robert Downey Jr, Florence Pugh, Rami Malek, and Benny Safdie. Hartnett's casting goes back to the time when Nolan was interested in him playing Bruce Wayne before eventually roping in Christian Bale for the job in Batman Begins, which also starred Murphy as Dr Jonathan Crane/ The Scarecrow. Dead Wrong: Rob Schneider Joins the Cast of Rick Bieber’s Indie Crime Drama.

Oppenheimer is based on the Pulitzer Prize-winning book "American Prometheus: The Triumph and Tragedy of J Robert Oppenheimer" by Kai Bird and Martin J Sherwin. Nolan will write and direct the film, while his creative partner and wife Emma Thomas will produce with Charles Roven of Atlas Entertainment. The movie is slated for a July 21, 2023 arrival, a date synonymous with Nolan's previous films release.

The Oppenheimer release also comes roughly two weeks before the anniversary of the dropping of the bomb on Hiroshima. Universal had no comment. Hartnett will next reunite with his "Wrath of Man" director Guy Ritchie on "Operation Fortune: Ruse de guerre" and star in "The Fear Index", a Sky TV series.

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