Al Pacino Don Michael Corleone
Robert De Niro Vito Corleone
Talia Shire Constanzia 'Connie' Corleone
James Caan Thanks, Sonny Corleone (uncredited)
Diane Keaton Kay Corleone
Robert Duvall Tom Hagen
Francis Ford Coppola Producer, Screenplay, Director
Sofia Coppola Child on Ship (uncredited)
Tony Sirico Rosato Brothers Hood (uncredited)
Roman Coppola Sonny Corleone as a Boy (uncredited)
Harry Dean Stanton F.B.I. Man #1
Bruno Kirby Young Clemenza
Joe Spinell William 'Willie' Cicci
John Cazale Frederico 'Fredo' Corleone
Brian De Palma Musician
Danny Aiello Tony Rosato
Roger Corman Senator #2
Dominic Chianese Johnny Ola
Marianna Hill Deanna Corleone
G.D. Spradlin Senator Pat Geary
Michael V. Gazzo Frank Pentangeli
Troy Donahue Merle Johnson
Abe Vigoda Salvatore 'Sal' Tessio
Ted Grossman Stunts
Erica Yohn Governess
Frank Sivero Genco Abbandando
Richard Bright Al Neri
Arthur Tovey Senate Hearing Spectator (uncredited)
Jay Rasumny Street Vendor (uncredited)
Sho Kosugi Passerby in Coat with Cap Pulled Down (uncredited)
Lee Strasberg Hyman Roth
Kathleen Beller Girl in 'Senza Mamma'
Walter Murch Sound Editor, Sound Re-Recording Mixer
Richard Matheson Senator #3 (uncredited)
George Sawaya Stunts
Gastone Moschin Don Fanucci
Gianni Russo Carlo Rizzi
Carmen Argenziano Michael's Buttonman #2
Kathryn Janssen Senate Hearing Spectator (uncredited)
Jack Berle Senate Hearing Spectator (uncredited)
Francesca De Sapio Young Mama Corleone
Newt Arnold Assistant Director
Ivonne Coll Yolanda
Leopoldo Trieste Signor Roberto
Mario Puzo Novel, Screenplay
John Megna Young Hyman Roth (uncredited)
Carmine Caridi Carmine Rosato
Maria Carta Mrs. Andolini
Fay Spain Mrs. Marcia Roth
Mario Cotone Don Tommasino, Unit Manager
Mike Fenton Casting
Tere Livrano Theresa Hagen
Nino Rota Original Music Composer
Dick Cherney Senate Hearing Spectator (uncredited)
Mark Berger Sound Montage Associate
John Aprea Young Tessio
George Holmes Senate Hearing Spectator (uncredited)
William Bowers Senate Committee Chairman
Shep Houghton Senate Hearing Spectator (uncredited)
Wally West Senate Hearing Spectator (uncredited)
Oreste Baldini Young Vito
Peter Donat Questadt
Charles H. Schram Makeup Artist
George Holmes Gaffer
Salvatore Po Pentangeli's Brother
Nancy McArdle Wardrobe Master
Wayne Fitzgerald Title Designer
Julian Voloshin Sam Roth (uncredited)
Gary Kurtz Photographer in Court (uncredited)
Joseph Della Sorte Michael's Buttonman #1
Gray Frederickson Co-Producer
Ray Summers Key Costumer