Gary Oldman

Herman Mankiewicz

Amanda Seyfried

Marion Davies

Lily Collins

Rita Alexander

Arliss Howard

Louis B. Mayer

Tom Pelphrey

Joseph Mankiewicz

Sam Troughton

John Houseman

Ferdinand Kingsley

Irving Thalberg

Tuppence Middleton

Sara Mankiewicz

Tom Burke

Orson Welles

Joseph Cross

Charles Lederer

Jamie McShane

Shelly Metcalf

Toby Leonard Moore

David O. Selznick

Monika Gossmann

Fräulein Frieda

Charles Dance

William Randolph Hearst

Adam Shapiro

George S. Kaufman

John Churchill

Charles MacArthur

Jeff Harms

Ben Hecht

Sean Persaud

Tommy

Paul Fox

Joe Von Sternberg

Tom Simmons

Doctor

Cooper Tomlinson

Younger Man

Julie Collis

Female Starlet

Arlo Mertz

Child Star

Craig Welzbacher

Rexford Tugwell

Jessie Cohen

Norma Shearer Thalberg

Desiree Louise

Irene Selznick

Amie Farrell

Mrs. Meyer

Lou George

Ed the Gate Guard

John Lee Ames

Grady

Bill Nye

Upton Sinclair

Richmond Arquette

Heckler

David Lee Smith

Sinclair Supporter

Mario Di Donato

A Man's Voice (voice)

Flo Lawrence

Maude Anderson

Sebastian Faure

Movie Star #1

Randy Davison

Maître D

Christian Prentice

Emcee

Leven Rambin

Eve - Shelly's Girlfriend

Rick Pasqualone

Singer

Mark Fite

James Wilson

John Patrick Jordan

Best Original Screenplay Announcer

Ben Mankiewicz

Broadcaster, Academy Awards

Natalie Denise Sperl

Movie Star #2

Brian Michael Jones

Aide - Ben

Camille Montgomery

Starlet #1

Paul Carafotes

Assistant Director

Anne Beyer

Female Party Goer

Sean Donnellan

Martin Butler

Stewart Skelton

News Reel I

Keith Barber

News Reel III

Kaytlin Borgen

Mayer's Assistant

Madison West

Starlet #2

Elvy

Starlet #3

Wylie Small

Wife #2

Cary Christopher

Young Joseph Mankiewicz (uncredited)

Kingston Vernes

Young Herman Mankiewicz (uncredited)

Jordan Matlock

Groundskeeper (uncredited)

Anthony Molinari

Hobo (uncredited)

Sebastian Twohey-Jacobs

Beach Goer (uncredited)