Josh Brolin character Eddie Mannix
George Clooney character Baird Whitlock
Alden Ehrenreich character Hobie Doyle
Ralph Fiennes character Laurence Laurentz
Scarlett Johansson character DeeAnna Moran
Tilda Swinton character Thora Thacker / Thessaly Thacker
Channing Tatum character Burt Gurney
Frances McDormand character C. C. Calhoun
Jonah Hill character Joe Silverman
Veronica Osorio character Carlotta Valdez
Heather Goldenhersh character Natalie (Secretary)
Alison Pill character Connie Mannix
Max Baker character John Howard Hermann
Fisher Stevens character Communist Writer
Patrick Fischler character Benedict (Communist Writer)
Tom Musgrave character Communist Writer
David Krumholtz character Herschel (Communist Writer)
Greg Baldwin character Dutch Zweistrong (Communist Writer)
Patrick Carroll character Communist Writer
Fred Melamed character Fred (Communist Writer)
John Bluthal character Herbert Marcuse
Alex Karpovsky character Mr. Smitrovich
Armazd Stepanian character Eastern Orthodox Clergyman
Allan Havey character Protestant Clergyman
Robert Pike Daniel character Catholic Clergyman
Robert Picardo character Rabbi
Ian Blackman character Cuddahy
Geoffrey Cantor character Sid Siegelstein
Christopher Lambert character Arne Seslum
Robert Trebor character Producer of "Hail, Caesar!"
Michael Yama character Chinese Restaurant Maître D'
Ming Zhao character Chinese Restaurant Waitress
Helen Siff character Malibu Maid
Basil Hoffman character Stu Schwartz, Accounting
Luke Spencer Roberts character Peanut
Ralph P. Martin character Director of Action Western
James Austin Johnson character Studio Assistant at Action Western
Noah Baron character Water Ballet P.A.
Timm Perry character Stage 8 Man at the Door
Noel Conlon character Scotty at the Gate
Natasha Bassett character Gloria DeLamour
Richard Abraham character French Postcard Photographer
Jon Daly character Cop at French Postcard House
Dennis Cockrum character Cop at French Postcard House
Clancy Brown character Gracchus
Mather Zickel character Chunk Mulligan
Tiffany Lonsdale character Ursulina
Clement von Franckenstein character Senator Sestimus Amydias
Wayne Knight character Lurking Extra
Jeff Lewis character Lurking Extra
Kyle Bornheimer character Extras A.D.
Josh Cooke character Box Breakfast A.D.
Peter Jason character Director
Stephen Ellis character Clapper Boy
Jillian Armenante character Script Girl
Jacob Witkin character Saul of Tarsus
Jack Huston character Cad in Cab
Agyness Deyn character Woman in Cab
Emily Beecham character Dierdre
Benjamin Beatty character Clapper Boy
J.R. Horne character Curly
Caitlin Muelder character Cookhouse Woman
E.E. Bell character Bartender
Kate Morgan Chadwick character Departing Woman
Brian Michael Jones character Sailor
Peter Banifaz character Sailor
Clifton Samuels character Sailor / Dancer
K.C. Reischerl character Sailor
Jeremy Davis character Dancer
Marcos Ochoa character Dancer
Colin Bradbury character Dancer
Ryan Breslin character Dancer
Tyler Hanes character Dancer
Casey Garvin character Dancer
Luke Hawkins character Dancer
Evan Kasprzak character Dancer
Patrick Lavallee character Dancer
Adam Perry character Dancer
Ryan Vandenboom character Dancer
Alex Demkin character Dancer
Dax Hock character Dancer
Shesha Marvin character Dancer
Mark Stuart character Dancer
Forrest Walsh character Dancer
Michael Gambon character Narrator (voice)
Tomoko Karina character Imperial Garden Waitress (uncredited)
Dolph Lundgren character Submarine Commander (uncredited)
Dean England character Animal Handler (uncredited)
Sandy Mansson character Israelite
Jessee Foudray character Jonah's Daughter Harpist (uncredited)