Peter Sellers
Aldo Vanucci / Federico Fabrizi
Victor Mature
Tony Powell
Britt Ekland
Gina Vanucci aka "Gina Romantica"
Martin Balsam
Harry
Akim Tamiroff
Okra
Paolo Stoppa
Polio
Tino Buazzelli
Siepi
Mac Ronay
Carlo
Maria Grazia Buccella
Bikini Girl
Lando Buzzanca
Police Chief
Vittorio De Sica
Himself
Maurice Denham
Chief of Interpol
Tiberio Murgia
1st Detective
Carlo Croccolo
Cafe Owner
Nino Musco
Mayor
Pier Luigi Pizzi
Doctor
Lino Mattera
Singer
Piero Gerlini
1st Gaoler
Daniele Vargas
Prosecutor
Giustino Durano
Critic
Mimmo Poli
Fat Actor
Enzo Fiermonte
Raymond
Timothy Bateson
Michael O'Reilly
David Lodge
Policeman
Lucia Cavalieri
Bingo Player (uncredited)
Lydia Brazzi
Mamma Vanucci
Francesco De Leone
2nd Detective
Franco Sportelli
Judge
Angelo Spaggiari
Felix Kessler
Mario Del Vago
Manuel Ortega
