Marlon Brando
as Don Vito Corleone

Al Pacino
as Michael Corleone

James Caan
as Sonny Corleone

Robert Duvall
as Tom Hagen

Richard S. Castellano
as Clemenza

Diane Keaton
as Kay Adams

Talia Shire
as Connie Corleone Rizzi

Gianni Russo
as Carlo Rizzi

Sterling Hayden
as Captain McCluskey

John Marley
as Jack Woltz

Richard Conte
as Barzini

Al Lettieri
as Sollozzo

Abe Vigoda
as Sal Tessio

John Cazale
as Fredo Corleone

Rudy Bond
as Cuneo

Al Martino
as Johnny Fontane

Morgana King
as Mama Corleone

Lenny Montana
as Luca Brasi

John Martino
as Paulie Gatto

Salvatore Corsitto
as Bonasera

Richard Bright
as Neri

Alex Rocco
as Moe Greene

Tony Giorgio
as Bruno Tattaglia

Vito Scotti
as Nazorine

Tere Livrano
as Theresa Hagen

Victor Rendina
as Philip Tattaglia

Jeannie Linero
as Lucy Mancini

Julie Gregg
as Sandra Corleone

Ardell Sheridan
as Mrs. Clemenza

Simonetta Stefanelli
as Apollonia - Sicilian Sequence

Angelo Infanti
as Fabrizio - Sicilian Sequence

Corrado Gaipa
as Don Tommasino - Sicilian Sequence

Franco Citti
as Calo - Sicilian Sequence

Saro Urzì
as Vitelli - Sicilian Sequence

Roman Coppola
as Boy on Street Who Attended Funeral (uncredited)

Sofia Coppola
as Michael Francis Rizzi (uncredited)

Don Costello
as Don Victor Stracci (uncredited)

Italia Coppola
as Extra in Wedding Scene (uncredited)

Gray Frederickson
as Cowboy on the Set at Woltz's Studio (uncredited)

Ron Gilbert
as Usher in Bridal Party (uncredited)

Sonny Grosso
as Cop Outside Hospital (uncredited)

Louis Guss
as Don Zaluchi (uncredited)

Randy Jurgensen
as Sonny's Killer #1 (uncredited)

Tony King
as Tony - Stablehand (uncredited)

Tony Lip
as Wedding Guest (uncredited)

Joe Lo Grippo
as Sonny's Bodyguard (uncredited)

Lou Martini Jr.
as Boy at Wedding (uncredited)

Raymond Martino
as Corleone Family Member (uncredited)

Joseph Medaglia
as Priest at Baptism (uncredited)

Carol Morley
as Night Nurse (uncredited)

Rick Petrucelli
as Lou - Sollozzo's Driver (uncredited)

Sal Richards
as Drunk (uncredited)

Tom Rosqui
as Rocco Lampone (uncredited)

Frank Sivero
as Street Extra (uncredited)

Filomena Spagnuolo
as Extra in Wedding Scene (uncredited)

Joe Spinell
as Willi Cicci (uncredited)

Gabriele Torrei
as Enzo the Baker (uncredited)

Nick Vallelonga
as Wedding Party Guest (uncredited)

Conrad Yama
as Fruit Vendor (uncredited)

MAHAD
as SONNY