Napoleon Solo

Robert Vaughn

Illya Kuryakin

David McCallum

Alexander Waverly

Leo G. Carroll

Louis Strago

Jack Palance

Miss Diketon

Janet Leigh

Arturo `Fingers' Stilletto

Eduardo Ciannelli

Pia Monteri

Leticia Roman

Enzo `Pretty' Stilletto

Allen Jenkins

Dr. Heinrich von Kronen

Ludwig Donath

Yvonne Craig

Federico 'Feet' Stilletto

Jack La Rue

Mr. Thaler

Will Kuluva

Thrush Boss

Mrs. `Fingers' Stilletto

Joan Blondell

Grandma Monteri

Penny Santon

Benjamin Luger

Vincent Beck

Padre

Frank Puglia

Dorothy Provine

`Crunch' Battaglia

Maxie Rosenbloom

`Scissors'

Vince Barnett

Arnold

Elisha Cook Jr.

"Crunch" Battaglia

"Slapsie Maxie" Rosenbloom

Thrush Captain

James Almanzar

Rip Torn

Thrush Officer

Clarke Gordon

Mrs. Feinberg

Jesslyn Fax

Boy

Jimmy Bates

Donkey Man

David Renard

Miss Gorgeous

Sharyn Hillyer

Miss Diketon (french voice) (uncredited)

Anne Caprile

Leoda Richards