Leonardo DiCaprio character Howard Hughes
Cate Blanchett character Katharine Hepburn
Kate Beckinsale character Ava Gardner
John C. Reilly character Noah Dietrich
Alec Baldwin character Juan Trippe
Alan Alda character Senator Ralph Owen Brewster
Ian Holm character Professor Fitz
Jude Law character Errol Flynn
Kelli Garner character Faith Domergue
Danny Huston character Jack Frye
Brent Spiner character Robert Gross
Willem Dafoe character Roland Sweet
Gwen Stefani character Jean Harlow
Adam Scott character Johnny Meyer
Matt Ross character Glenn Odekirk
Frances Conroy character Mrs. Hepburn
Stanley DeSantis character Louis B. Mayer
Keith Campbell character Marine
Amy Sloan character Howard Hughes's Mother
Kevin O'Rourke character Spencer Tracy
Nellie Sciutto character Secretary
Edward Herrmann character Joseph Breen
Kenneth Welsh character Dr. Hepburn
J. C. MacKenzie character Ludlow
Jacob Davich character Howard Hughes - 9 Years Old
Sam Hennings character Frank
Vince Giordano character Cocoanut Grove Band Member
Jason Cavalier character Cocoanut Grove Patron
Rufus Wainwright character Cocoanut Grove Vocalist #1
Loudon Wainwright III character Cocoanut Grove Vocalist #2
Martha Wainwright character Cocoanut Grove Vocalist #3
Al Dubois character Pan Am Executive #1
John Koensgen character Pan Am Executive #2
Harry Standjofski character Crony of Louis B. Mayer
Josie Maran character Cigarette Girl
Joe Chrest character Hell's Angels Director of Photography
Justin Shilton character Hell's Angels Pilot
Arthur Holden character Radio Announcer
Joseph P. Reidy character Aide to Howard
Stéphane Demers character Maitre d'
Yves Jacques character Waiter
Chris Ufland character Engineer
Sebastian Tillinger character Timer
James Bradford character Uncle Willy
Francesca Scorsese character Little Girl
Alan Toy character Man on Crutches
Joe Cobden character Another Guest #1
Linda E. Smith character Another Guest #2
David Purdham character Emcee
Alan Fawcett character Chairman MPA
Lisa Bronwyn Moore character Noah's Wife
Emma Campbell character Helen - Jack Frye's wife
Vincent Laresca character Jorge
Matt Holland character Hughes' Staff Person
Dennis St John character Nick the Custodian
Al Vandecruys character Doctor
James Rae character FBI Agent
Kathleen McAuliffe character Brewster's Maid
Terry Haig character Another Senator
Danielle Franke character Esquire Starlet (uncredited)
Meghan Elizabeth character Starlet (uncredited)
Elizabeth DeCicco character Starlet (uncredited)
Elisa Dyann character Coat Check Girl (uncredited)
Isabelle Champeau character Editor (uncredited)
Al Coronel character Bi-Plane Mechanic (uncredited)
