 Josh BrolinEddie Mannix | Eddie Mannix |
 George ClooneyBaird Whitlock | Baird Whitlock |
 Alden EhrenreichHobie Doyle | Hobie Doyle |
 Ralph FiennesLaurence Laurentz | Laurence Laurentz |
 Scarlett JohanssonDeeAnna Moran | DeeAnna Moran |
 Tilda SwintonThora Thacker / Thessaly Thacker | Thora Thacker / Thessaly Thacker |
 Channing TatumBurt Gurney | Burt Gurney |
 Frances McDormandC. C. Calhoun | C. C. Calhoun |
 Jonah HillJoe Silverman | Joe Silverman |
 Veronica OsorioCarlotta Valdez | Carlotta Valdez |
 Heather GoldenhershNatalie (Secretary) | Natalie (Secretary) |
 Alison PillMrs. Mannix | Mrs. Mannix |
 Max BakerHead Communist Writer | Head Communist Writer |
 Fisher StevensCommunist Writer | Communist Writer |
 Patrick FischlerCommunist Writer | Communist Writer |
| TTom MusgraveCommunist Writer | Communist Writer |
 David KrumholtzCommunist Writer | Communist Writer |
 Greg BaldwinCommunist Writer | Communist Writer |
 Patrick CarrollCommunist Writer | Communist Writer |
 Fred MelamedCommunist Writer | Communist Writer |
 John BluthalProf. Marcuse | Prof. Marcuse |
 Alex KarpovskyMr. Smitrovich | Mr. Smitrovich |
| AArmazd StepanianEastern Orthodox Clergyman | Eastern Orthodox Clergyman |
| AAllan HaveyProtestant Clergyman | Protestant Clergyman |
 Robert Pike DanielCatholic Clergyman | Catholic Clergyman |
 Robert PicardoRabbi | Rabbi |
 Ian BlackmanCuddahy | Cuddahy |
 Geoffrey CantorSid Siegelstein | Sid Siegelstein |
 Christopher LambertArne Seslum | Arne Seslum |
 Robert TreborProducer of "Hail, Caesar!" | Producer of "Hail, Caesar!" |
