Arguably one of the biggest and most anticipated movie events of the summer, people have been anxiously counting down the days to see Christopher Nolan 's latest three-hour masterpiece.
With an award-winning cast bringing the likes of J. Robert Oppenheimer and Harry S. Truman to life on the big screen , let's take a minute to get to know who's who in the epic film. Here's a roundup of all the actors then vs. now:
1.
To start, Cillian Murphy plays the leading role of J. Robert Oppenheimer.
And here's what he looked like as Jim in his breakout role in 28 Days Later .
And here's what he looked like in his breakout role as Will in Good Will Hunting .
4.
Robert Downey Jr. plays Lewis Strauss.
And here's what he looked like in his breakout role as Ian in Weird Science .
5.
Florence Pugh plays Jean Tatlock.
And here's what she looked like as Dani in Midsommar .
6.
Benny Safdie plays Edward Teller.
And here's what he looked like in his breakout role as Chris in Pieces of a Woman .
7.
Josh Hartnett plays Ernest Lawrence.
And here's what he looked like in his breakout role as John in Halloween H20: 20 Years Later .
8.
Matthew Modine plays Vannevar Bush.
And here's what he looked like in his breakout role as Pvt. Joker in Full Metal Jacket .
9.
Dylan Arnold plays Frank Oppenheimer.
And here's what he looked like in his breakout role as Cameron in the reboot of the Halloween franchise.
10.
Michael Angarano plays Robert Serber.
And here's what he looked like in his breakout role as the younger version of William in Almost Famous .
11.
Danny Deferrari plays Enrico Fermi.
And here's what he looked like in his breakout role as Sam in Pan Am .
12.
Emma Dumont plays Jackie Oppenheimer.
And here's what she looked like in her breakout role as Melanie in Bunheads .
13.
Josh Peck plays Kenneth Bainbridge.
And here's what he looked like in his breakout role as Wayne in Snow Day .
14.
Alden Ehrenreich plays a senate aide.
And here's what he looked like in his breakout role as Ethan in Beautiful Creatures .
15.
Gustaf Skarsgård plays Hans Bethe.
And here's what he looked like in his breakout role as Floki in Vikings .
16.
Devon Bostick plays Seth Neddermeyer.
And here's what he looked like in his breakout role as Rodrick in the Diary of a Wimpy Kid film series.
17.
Gary Oldman plays Harry S. Truman.
And here's what he looked like in his breakout role as Dracula in Bram Stoker's Dracula .
18.
Jack Quaid plays Richard Feynman.
And here's what he looked like in his breakout role as Marvel in The Hunger Games .
19.
Kenneth Branagh plays Niels Bohr.
And here's what he looked like in his breakout role as King Henry V in Henry V .
20.
Dane DeHaan plays Kenneth Nichols.
And here's what he looked like in his breakout role as Andrew in Chronicle .
21.
Casey Affleck plays Boris Pash.
And here's what he looked like in his breakout role as Virgil in Ocean's Eleven .
22.
Tony Goldwyn plays Gordon Gray.
And here's what he looked like in his breakout role as Carl in Ghost .
23.
Jason Clarke plays Roger Robb.
And here's what he looked like in his breakout role as Tommy in Brotherhood .
24.
James D'Arcy plays Patrick Blackett.
And here's what he looked like in his breakout role as First Lt. Tom Pullings in Master and Commander: The Far Side of the World .
25.
Gregory Jbara plays Chairman Magnuson.
And here's what he looked like in his breakout role as Les in Remember Me .
26.
Ted King plays Senator Bartlett.
And here's what he looked like in his breakout role as Inspector Andy Trudeau in Charmed .
27.
David Krumholtz plays Isidor Rabi.
And here's what he looked like in his breakout role as Joel in Addams Family Values .
28.
Christopher Denham plays Klaus Fuchs.
And here's what he looked like in his breakout role as Mark in Argo .
29.
Tom Conti plays Albert Einstein.
And here's what he looked like in his breakout role as Alan in American Dreamer .
30.
David Dastmalchian plays William Borden.
And here's what he looked like in his breakout role as Kurt in the Ant-Man film series.
31.
Rami Malek plays David Hill.
And here's what he looked like in his breakout role as Ahkmenrah in the Night at the Museum movies.
32.
Alex Wolff plays Luis Alvarez.
And here's what he looked like in his breakout role as Alex in The Naked Brothers Band .
33.
Finally, Josh Zuckerman plays Rossi Lomanitz.
And here's what he looked like in his breakout role as Brian in Surviving Christmas .
Who are you most excited to see on screen in Oppenheimer ? And do you think the movie will live up to the hype? Let us know in the comments!
