Al Pacino
Robert Duvall
Diane Keaton
Robert De Niro
John Cazale
Talia Shire
Lee Strasberg
Michael V. Gazzo
G.D. Spradlin
Richard Bright
Al Pacino as Don Michael Corleone
Robert Duvall as Tom Hagen
Diane Keaton as Kay Corleone
Robert De Niro as Vito Corleone
John Cazale as Fredo Corleone
Talia Shire as Connie Corleone
Lee Strasberg as Hyman Roth
Michael V. Gazzo as Frankie Pentangeli
G.D. Spradlin as Sen. Pat Geary
Richard Bright as Al Neri
Gastone Moschin as Don Fanucci (as Gaston Moschin)
Tom Rosqui as Rocco Lampone
Bruno Kirby as Young Clemenza (Peter) (as B. Kirby Jr.)
Frank Sivero as Genco Abbandando
Francesca De Sapio as Young Mama Corleone (as Francesca de Sapio)