Robert Vaughn

Napoleon Solo

David McCallum

Illya Kuryakin

Jack Palance

Louis Strago

Janet Leigh

Miss Diketon

Eduardo Ciannelli

Arturo 'Fingers' Stilletto

Allen Jenkins

Enzo 'Pretty' Stilletto

Jack La Rue

Federico 'Feet' Stilletto

Leo G. Carroll

Alexander Waverly

Joan Blondell

Mrs. 'Fingers' Stilletto

Ludwig Donath

Dr. Heinrich von Kronen

Will Kuluva

Mr. Thaler, Thrush Boss

Letícia Román

Pia Monteri

Penny Santon

Grandma Monteri

Frank Puglia

Padre

Vincent Beck

Benjamin Luger

Maxie Rosenbloom

'Crunch' Battaglia

Vince Barnett

'Scissors'

Elisha Cook Jr.

Arnold

James Almanzar

Thrush Captain

Clarke Gordon

Thrush Officer

Jesslyn Fax

Mrs. Feinberg

Jimmy Bates

Boy

David Renard

Donkey Man

Sharyn Hillyer

Miss Gorgeous

Anne Caprile

Miss Diketon (french voice) (uncredited)

Leoda Richards