Robert De Niro
Vito Corleone
Danny Aiello
Tony Rosato
Al Pacino
Don Michael Corleone
Sofia Coppola
Child on Ship (uncredited)
James Caan
Sonny Corleone (uncredited)
Robert Duvall
Tom Hagen
Diane Keaton
Kay Corleone
Abe Vigoda
Salvatore 'Sal' Tessio
Talia Shire
Constanzia 'Connie' Corleone
Gianni Russo
Carlo Rizzi
John Cazale
Frederico 'Fredo' Corleone
Lee Strasberg
Hyman Roth
Michael V. Gazzo
Frank Pentangeli
G. D. Spradlin
Senator Pat Geary
Richard Bright
Al Neri
Francesca De Sapio
Young Mama Corleone
Gastone Moschin
Don Fanucci
Harry Dean Stanton
F.B.I. Man #1
John Megna
Young Hyman Roth (uncredited)
Bruno Kirby
Young Clemenza
Frank Sivero
Genco Abbandando
Gary Kurtz
Photographer in Court (uncredited)
Richard Matheson
Senator #3 (uncredited)
Leopoldo Trieste
Signor Roberto
Carmine Foresta
Policeman
Peter Donat
Questadt
Marianna Hill
Deanna Corleone
Joe Spinell
William 'Willie' Cicci
Maria Carta
Mrs. Andolini
Carmen Argenziano
Michael's Buttonman #2
Roman Coppola
Sonny Corleone as a Boy (uncredited)
Erica Yohn
Governess
Troy Donahue
Merle Johnson
Ivonne Coll
Yolanda
Buck Houghton
Senator with mustache (uncredited)
Julian Voloshin
Sam Roth (uncredited)
Dominic Chianese
Johnny Ola
William Bowers
Senate Committee Chairman
Kathleen Beller
Girl in 'Senza Mamma'
Amerigo Tot
Michael's Bodyguard
Sho Kosugi
Passerby in Coat with Cap Pulled Down (uncredited)
Roger Corman
Senator #2
John Aprea
Young Tessio
Fay Spain
Mrs. Marcia Roth
Carmine Caridi
Carmine Rosato
Jay Rasumny
Street Vendor (uncredited)
Julie Gregg
Sandrinella 'Sandra' Corleone (uncredited)
Morgana King
Mama Corleone
Tere Livrano
Theresa Hagen
Tom Dahlgren
Fred Corngold
David Baker
F.B.I. Man #2