Cary Grant

as Walter Christopher Eckland

Leslie Caron

as Catherine Freneau

Trevor Howard

as Commander Frank Houghton

Jack Good

as Lieutenant Stebbings

Sharyl Locke

as Jenny

Pip Sparke

as Anne

Verina Greenlaw

as Christine

Stephanie Berrington

as Elizabeth Anderson

Jennifer Berrington

as Harriet MacGregor

Laurelle Felsette

as Angelique

Nicole Felsette

as Dominique

Alex Finlayson

as Doctor Bigrave

Peter Forster

as Chaplain

Frank Marocco

as Accordionist

John Napier

as Lt. Cartwright

Simon Scott

as Captain of Submarine, USS Sailfin

Don Spruance

as Navigator

Ken Swofford

as Helmsman, Submarine USS Sailfin

Richard Lupino

as Radioman