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