Capt. Cyrus Harding

Michael Craig

Acting

Lady Mary Fairchild

Joan Greenwood

Acting

Herbert Brown

Michael Callan

Acting

Gideon Spilitt

Gary Merrill

Acting

Captain Nemo

Herbert Lom

Acting

Elena Fairchild

Beth Rogan

Acting

Sgt. Pencroft

Percy Herbert

Acting

Cpl. Neb Nugent

Dan Jackson

Acting

Pirate (uncredited)

Harry Monty

Acting