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