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

Lydia Brazzi

Mamma Vanucci

Vittorio De Sica

Himself

Maurice Denham

Chief of Interpol

Tiberio Murgia

1st Detective

Francesco De Leone

2nd Detective

Vittorio De Sica