 Gary OldmanHerman Mankiewicz | Herman Mankiewicz |
 Amanda SeyfriedMarion Davies | Marion Davies |
 Lily CollinsRita Alexander | Rita Alexander |
 Arliss HowardLouis B. Mayer | Louis B. Mayer |
 Tom PelphreyJoseph Mankiewicz | Joseph Mankiewicz |
 Sam TroughtonJohn Houseman | John Houseman |
 Ferdinand KingsleyIrving Thalberg | Irving Thalberg |
 Tuppence MiddletonSara Mankiewicz | Sara Mankiewicz |
 Tom BurkeOrson Welles | Orson Welles |
 Joseph CrossCharles Lederer | Charles Lederer |
 Jamie McShaneShelly Metcalf | Shelly Metcalf |
 Toby Leonard MooreDavid O. Selznick | David O. Selznick |
 Monika GossmannFräulein Frieda | Fräulein Frieda |
 Charles DanceWilliam Randolph Hearst | William Randolph Hearst |
| JJack RomanoSid Perelman | Sid Perelman |
 Adam ShapiroGeorge S. Kaufman | George S. Kaufman |
 John ChurchillCharles MacArthur | Charles MacArthur |
 Jeff HarmsBen Hecht | Ben Hecht |
| DDerek PetropolisEddie Cantor | Eddie Cantor |
 Sean PersaudTommy | Tommy |
 Paul FoxJoe Von Sternberg | Joe Von Sternberg |
 Tom SimmonsDoctor | Doctor |
| NNick JobJohn Gilbert | John Gilbert |
| CColin WardOlder Man | Older Man |
 Cooper TomlinsonYounger Man | Younger Man |
 Julie CollisFemale Starlet | Female Starlet |
 Arlo MertzChild Star | Child Star |
 Craig WelzbacherRexford Tugwell | Rexford Tugwell |
 Jessie CohenNorma Shearer Thalberg | Norma Shearer Thalberg |
 Desiree LouiseIrene Selznick | Irene Selznick |
