But which star is portraying which scientist and power player?

Find out with our guide to the cast and their respective characters below.

And you’re like, is this an offer?

Cillian Murphy, Robert Oppenheimer

Cillian Murphy in ‘Oppenheimer’ and the real J. Robert Oppenheimer.Universal Pictures, Bettmann Archive

It was so awesome."

“I was so blown away by the script,” theBournefranchise star said.

“It’s in the first person, which I’d never seen before.

Emily Blunt, Kitty Oppenheimer

Emily Blunt in ‘Oppenheimer’ and the real-life “Kitty” Oppenheimer.Melinda Sue Gordon/ Universal Pictures, CORBIS/Getty

So rather than say, ‘Oppenheimer crosses the room’ it says ‘I walk across the room.’

“I don’t know what those colors are.

Anyway, it’s a thing.

Matt Damon, General Leslie Groves

Matt Damon in ‘Oppenheimer’ and the real-life Gen. Leslie Groves.Universal Pictures, MPI/Getty

It’s kind of like being hypnotized.”

“Working with Florence was amazing,” said Nolan.

“[It was] a very tough role.

Robert Downey Jr, Lewis Strauss

Robert Downey Jr. in ‘Oppenheimer’ and the real-life Lewis Strauss.Melinda Sue Gordon/ Universal Pictures, Pictorial Parade/Archive Photos/Getty Images

Very precise, the screen timeshort, but so important in Oppenheimer’s life.”

“I didn’t even think he would know who I was.

But he’s a very serious physics nerd, he knows a lot.

L to R: Florence Pugh is Jean Tatlock in OPPENHEIMER, written, produced, and directed by Christopher Nolan, Jean Tatlock

Florence Pugh in ‘Oppenheimer’ and the real-life Jean Tatlock.Universal Pictures; Library of Congress

“I was genuinely surprised with Jason Clarke,” Damon told EW.

It was great.”

Oppenheimeris in theaters now.

Tom Conti, Albert Einstein

Tom Conti in ‘Oppenheimer’ and the real Albert Einstein.Melinda Sue Gordon/ Universal Pictures, Bettmann Archive

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David Dastmalchian, William Borden

David Dastmalchian and the real William Borden.Karwai Tang/WireImage, Bettmann Archive

Josh Hartnett, Ernest Lawrence

Josh Hartnett in ‘Oppenheimer’ and the real-life Ernest Lawrence.Melinda Sue Gordon/ Universal Pictures, Smith Collection/Gado/Getty

Kenneth Branagh, Niels Bohr

Kenneth Branagh in ‘Oppenheimer’ and the real-life Niels Bohr.Melinda Sue Gordon/ Universal Pictures, Bettmann Archive

David Krumholtz, Isidor Isaac Rabi

David Krumholtz in ‘Oppenheimer’ and the real-life Isidor Isaac Rabi.Universal Pictures/ Youtube, Corbis/Getty

Rami Malek, David L Hill

Rami Malek in ‘Oppenheimer’ and the real-life David L. Hill.Melinda Sue Gordon/ Universal Pictures, Bettmann Archive

Benny Safdie, Edward Teller

Benny Safdie in ‘Oppenheimer’ and the real-life Edward Teller.Universal Pictures/ Youtube, Bettmann Archive

Tony Goldwyn, Gordon Gray

Tony Goldwyn and real-life Gordon Gray.Dominik Bindl/WireImage, AP Photo

Jason Clarke, Roger Robb

Jason Clarke in ‘Oppenheimer’ and real-life Roger Robb.Melinda Sue Gordon/ Universal Pictures, AP Photo/John Rous