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