Howard Hughes
Marla Mabrey
Frank Forbes
Levar Mathis
Lucy Mabrey
Bob Maheu
Mamie Murphy
Nadine Henly
Raymond Holliday
Mr. Bransford
Noah Dietrich
Vernon Scott
Forester
Mrs. Bransford
Sarah Bransford
Solly
Colonel Nigel Briggs
Sally
Richard Miskin
Young Actor
Frank's Grandmother
Director
Senator Ferguson
Gene Handsaker
President Somoza
Colonel Willis
Rudolf
Marla Lookalike
Matt Mabrey
Cappy
Merrill Lynch Executive
T.V. Newsman #1
TV Newsman #2
Gladwin Hill
Air Traffic Controller
Bella
Betty
Carrie
Wilbur
Tom
Pianist
Methodist Minister
Baptist Preacher
Marvin
Colonel Maxwell
Concerned Orderly
Orderly
Nurse
Ice Cream Kid
Solly the Barber
Chef
Doctor Crone
Hughes Staffer
Mobster
Somoza's Aide
Herb (uncredited)
Self (archive footage) (uncredited)
Hughes Staffer (uncredited)
Rolls Royce Chauffeur (uncredited)
RKO Studio Executive (uncredited)