Peter Sellers
Role: Aldo Vanucci/Federico Fabrizi
Victor Mature
Role: Tony Powell
Britt Ekland
Role: Gina Vanucci/Gina Romantica
Tino Buazzelli
Role: Siepi
Maria Grazia Buccella
Role: Bikini Girl
Lando Buzzanca
Role: Police Chief
Lydia Brazzi
Role: Mamma Vanucci
Maurice Denham
Role: Chief of Interpol
Tiberio Murgia
Role: 1st Detective
Francesco De Leone
Role: 2nd Detective
Carlo Croccolo
Role: Cafe Owner
Pier Luigi Pizzi
Role: Doctor
Piero Gerlini
Role: 1st Gaoler
Daniele Vargas
Role: Prosecutor
Franco Sportelli
Role: Judge
Giustino Durano
Role: Critic
Mimmo Poli
Role: Fat Actor
Enzo Fiermonte
Role: Raymond
Angelo Spaggiari
Role: Felix Kessler
Mario Del Vago
Role: Manuel Ortega
Roberto De Simone
Role: Marcel Vignon
Timothy Bateson
Role: Michael O'Reilly (uncredited)
Ugo Carboni
Role: Pharmacist in Sevalio (uncredited)
Angelo Casadei
Role: Cameraman (uncredited)
Amerigo Castrighella
Role: Via Veneto café costumer (uncredited)
Lucia Cavalieri
Role: Bingo Player (uncredited)
Bruna Cealti
Role: Laundress (uncredited)
Vittorio De Sica
Role: Vittorio De Sica (uncredited)
Carlo Delle Piane
Role: (uncredited)
Daniela Igliozzi
Role: (uncredited)
David Lodge
Role: Police Officer (uncredited)
Cho Cha Lung
Role: Restaurant Patron (uncredited)
Enrico Luzi
Role: Movie Director on Via Veneto (uncredited)
Alba Maiolini
Role: Street Spectator (uncredited)
Maria Grazia Marescalchi
Role: Woman in Sevalio (uncredited)
Valeria Montesi
Role: Pharmacist's Wife (uncredited)
Peggy Nathan
Role: Bingo Player (uncredited)
Carlo Pisacane
Role: 2nd Judge (uncredited)
Marcella Rovena
Role: Salvatore's Wife (uncredited)
Alessandro Tedeschi
Role: Restaurant Customer (uncredited)
Francesco Telli
Role: Child in Sevalio (uncredited)
Nino Vingelli
Role: 3rd Judge (uncredited)