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)