Terence Hill as Johnny Firpo

Bud Spencer as Charlie Firpo

Luciano Catenacci as Paragoulis the Greek

Marisa Laurito as Sister Susanna

Kim McKay as Pupa

Sal Borgese as Nynfus

Jerry Lester as Mike Firpo

Woody Woodbury as Admiral O'Connor

Carlo Reali as Marine Officer

Riccardo Pizzuti as Mancino

Giancarlo Bastianoni as Verdone

Enzo Maggio as Tappo

Giovanni Cianfriglia as Gangster at Car Race

Claudio Ruffini as Pinky

Sergio Smacchi as Smilzo

Salvatore Basile as Gangster with Cigar

Antonio Verzura as Gangster

Jack McDermott as Lt. o'connor

Massimo Ciprari as Man in Pool Billard Pub (uncredited)

Bobby Gale as Pedro (uncredited)

Giuseppe Pedersoli as Naval officer (uncredited)

Mimmo Poli as Shop Owner (uncredited)