Liev Schreiber as Orson Welles

James Cromwell as William Randolph Hearst

Melanie Griffith as Marion Davies

John Malkovich as Herman Mankiewicz

Liam Cunningham as Gregg Toland

David Suchet as Louis B. Mayer

Fiona Shaw as Hedda Hopper

Anastasia Hille as Carole Lombard

Brenda Blethyn as Louella Parsons

Roy Scheider as George Schaefer

Roger Allam as Walt Disney

Simeon Andrews as John Houseman

William Armstrong as Mr. Lewis

Jay Benedict as Darryl Zanuck

Ron Berglas as David O. Selznick

Paul Birchard as Top Brass #2

Neil Conrich as Mr. Thomson

Michael Cronin as Joseph Willicombe

Sarah Franzl as Dorothy Comingore

Briony Glassco as Script Girl

Louis Hammond as Flunkie #2

Aaron Keeling as Young Orson Welles

Joseph Long as Harry Cohn

Gareth Marks as Top Brass #1

Olivier Pierre as Sam Goldwyn

Roger Rose as News Reader

Rolf Saxon as Flunkie #1

Adrian Schiller as Paul Stewart

Kerry Shale as Bernard Herrmann

Cyril Shaps as Jeweller

Tusse Silberg as Welles' Mother

Toby Whithouse as Sound Technician

Tim Woodward as Jack Warner

Angus Wright as Joseph Cotten

Bobby Valentino as Clark Gable