Don Vito Corleone / Peter Clemenza / Jack Woltz (voice)
Paulie Gatto (voice) (as Tony Alacanta)
Don Victor Stracci / Amerigo Bonasera / Tito Morelli (voice)
Signora Clemenza (voice)
Don Vito Corleone (voice) (archive footage)
Sonny Corleone (voice)
Luca Brasi (voice)
Frances 'Frankie' Malone (voice)
Rocco Lampone / Sergeant Joe Galtosino (voice)
Tom Hagen (voice)
Mama Corleone (voice)
Jack Fontana / Nicholas Klaus Mikey Saleri / Big Bobby Toro (voice)
Paulie the Peel / Rocky Della Barca / Scottie Harris / Joel Peter Pitkin (voice) (as Callum Grant)
Johnny Trapani / Cuneo Racket Boss (voice)
Francesco Barzini / Lorenzo Allegro / Harry Paramour / Buddy Corcoran (voice)
Kevin Moonan / Marco Cuneo / Bobby Marcolini (voice) (as Damien King)
Don Emilio Barzini (voice)
Serafina Trapani (voice)
Carmella Rotunda / Louisiana Dobber
Michael Corleone (voice)
Al Neri (voice)
The Trojan (voice)
Don Vito Corleone (voice)
Willie Cicci / Don Cuneo / Freddie Nobile (voice)
Viani Barzini / Lorina Morelli / Birdie Nightingale
Fredo Corleone (voice)
Bruno Tattaglia / Jaggy Jovino / Artie Manzanero / Raphael Rulandi (voice)
Jimmy DeNunzio / Emilio Barzini Jr. / Leon Grossi (voice)
The Player Aldo Trapani (voice)
Moe Greene / Mario DeBellis (voice)
Jerry Wagner / Johnny Tattaglia / Alfredo Arezzo (voice)
Marty Malone (voice)
Rosa Morelli (voice) (as Lori Ann Triolo)
Sal Tessio (voice)