Louis Hayward
Simon Templar
Charles Victor
Chief Insp. Claud Teal
William Russell
Keith Merton
Diana Dors
The Blonde in Lennar's Apartment
Fred Johnson
Irish Cassidy
Thomas Gallagher
Hoppy Uniatz
Russell Napier
Col. Stafford
George Margo
Lennar's Henchman
Ernest Blyth
Party Guest (uncredited)
Erik Chitty
Older gang member (uncredited)
Jack Mandeville
Party Guest (uncredited)
Bunny Seaman
Gambler (uncredited)
Ian Selby
Gambler (uncredited)
John Smart
Merton Party Guest (uncredited)
Harry Van Engel
Safari Club patron (uncredited)
Ian Wilson
Man Waiting for Telephone Booth (uncredited)