The Oppenheimer cast features Cillian Murphy, Emily Blunt and Matt Damon. This info article contains minor spoilers and character details for Christopher Nolan’s 2023 movie on Peacock. Check out more streaming guides in Vague Visages’ Know the Cast section.

Oppenheimer explores the life and times of a famous theoretical physicist. As J. Robert Oppenheimer thinks about the Nazi threat during World War II, he leads a secret government mission. The narrative follows the main protagonist as he builds an atomic bomb and deals with the consequences of his work. Here’s every actor in Oppenheimer, an adaptation of Kai Bird and Martin J. Sherwin’s 2005 book American Prometheus.

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Oppenheimer Cast: Cillian Murphy as J. Robert Oppenheimer

Character Profile: An American physicist. He leads The Manhattan Project during World War II. J. Robert struggles with the morals of his life decisions.

Murphy’s Resume: Jim in 28 Days Later (2002), Robert Capa in Sunshine (2007), Scarecrow in The Dark Knight (2010), Robert Fischer in Inception (2010), Thomas Shelby in Peaky Blinders (2013-22)

Read More at VV — Know the Cast & Characters: ‘The Tutor’

Oppenheimer Cast: Emily Blunt as Kitty Oppenheimer

Character Profile: J. Robert’s wife. She supports her husband as he develops an atomic bomb. Kitty is a member of the Communist Party.

Blunt’s Resume: Emily in The Devil Wears Prada (2006), Elise Sellas in The Adjustment Bureau (2011), Harriet in Salmon Fishing in the Yemen (2011), Rita in Edge of Tomorrow (2014), Evelyn Abbott in A Quiet Place (2018)

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Oppenheimer Cast: Matt Damon as Leslie Groves

Character Profile: J. Robert’s government handler. He directs The Manhattan Project. Leslie provides advice to J. Robert about the big picture.

Damon’s Resume: Will in Good Will Hunting (1997), Jason Bourne in The Bourne Identity Movie Franchise (2002-2016), Colin in The Departed (2006), Mark Watney in The Martian (2015), Sonny Vaccaro in Air (2023)

Read More at VV — Know the Cast & Characters: ‘Air’

Oppenheimer Cast: Robert Downey Jr. as Lewis Strauss

Character Profile: A U.S. Navy officer. He’s also a senior member of the United States Atomic Energy Commission. Lewis worries about J. Robert’s political views.

Downey Jr.’s Resume: Julian in Less Than Zero (1987), Charles Spencer Chaplin in Chaplin (1992), Tony Stark in the MCU (2008-), Sherlock Holmes in Sherlock Holmes (2009), Dr. John Dolittle in Dolittle (2020)

Read More at VV — Know the Cast & Characters: ‘Nimona’

Oppenheimer Cast: Florence Pugh as Jean Tatlock

Character Profile: J. Robert’s lover. She is a physician and a member of the Communist Party. Jean dies mysteriously in a bathtub.

Pugh’s Resume: Katherine in Lady Macbeth (2016), Charlie/Charmian Ross in The Little Drummer Girl (2018), Dani in Midsommar (2019), Amy March in Little Women (2019), Yelena Belova in Black Widow (2021)

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Oppenheimer Cast: Josh Hartnett as Ernest Lawrence

Character Profile: An American physicist. He is a Novel Prize winner. Ernest participates in The Manhattan Project with J. Robert.

Hartnett’s Resume: Zeke Tyler in The Faculty (1998), Eversmann in Black Hawk Down (2001), Dwight “Bucky” Bleichert in The Black Dahlia (2006), Slevin in Lucky Number Slevin (2006), Eben Oleson in 30 Days of Night (2007)

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The Oppenheimer cast also includes:

• Casey Affleck as Boris Pash
• Rami Malek as David Hill
• Kenneth Branagh as Niels Bohr
• Benny Safdie as Edward Teller
• Dylan Arnold as Frank Oppenheimer
• Gustaf Skarsgård as Hans Bethe
• David Krumholtz as Isidor Isaac Rabi
• Matthew Modine as Vannevar Bush
• David Dastmalchian as William L. Borden
• Tom Conti as Albert Einstein
• Michael Angarano as Robert Serber
• Jack Quaid as Richard Feynman
• Josh Peck as Kenneth Bainbridge
• Olivia Thirlby as Lilli Hornig
• Dane DeHaan as Kenneth Nichols
• Danny Deferrari as Enrico Fermi
• Alden Ehrenreich as a Senate Aide
• Jefferson Hall as Haakon Chevalier
• Jason Clarke as Roger Robb
• James D’Arcy as Patrick Blackett

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.