Don Vito Corleone (voice) (archive footage)
Tom Hagen (voice)
Sonny Corleone (voice)
Salvatore Tessio (voice)
Don Vito Corleone / Peter Clemenza / Jack Woltz (voice)
Aldo 'The Player' Trapani (voice)
Rocco Lampone / Sergeant Joe Galtosino (voice) (as Mike Dobson)
Luca Brasi (voice)
Marty Malone (voice)
Frances 'Frankie' Malone (voice)
Michael Corleone (voice) (as Joe May)
Virgil 'The Turk' Sollozzo (voice)
Fredo Corleone (voice)
Rose Morelli (voice)
Paulie Gatto (voice) (as Tony Alacanta)
The Trojan (voice)
Don Emilio Barzini (voice)
Don Philip Tattaglia / Emilio Brunetti (voice)
Al Neri (voice)
Racket Bosses (voice)
Mama Corleone / Nightclub Owners (voice)
Signora Clemenza (voice)
Luciano Fabbri / Ronnie Tosca / Barbers / Butchers / Undertakers (voice)
Sergeant Ferriera (voice) (as Callum Grant)
Willie Cicci (voice)
Cuneo Racket Boss (voice)
(voice)
Kevin Moonan (voice) (as Damien King)
Serafina Trapani (voice)
Young Aldo Trapani / Restaraunteurs (voice)
Don Carmine Cuneo / Tattaglia Underboss (voice) (as Jarion Munroe)
Bruno Tattaglia / Jaggy Jovino (voice)
Jimmy DeNunzio (voice)
Moe Greene (voice)
Johnny Tattaglia / Cops (voice)
Various (uncredited)