Doris Day as Kit Preston

Rex Harrison as Anthony Preston

John Gavin as Brian Younger

Myrna Loy as Aunt Bea

Roddy McDowall as Malcolm

Herbert Marshall as Charles Manning

Natasha Parry as Peggy Thompson

Hermione Baddeley as Dora Hammer

John Williams as Inspector Byrnes

Richard Ney as Daniel Graham

Anthony Dawson as Roy Ash

Rhys Williams as Victor Elliot

Richard Lupino as Simon Foster

Hayden Rorke as Dr. Garver

Doris Lloyd as Nora Stanley

Elspeth March as Woman

Peter Adams as Man at American Consulate

Rex Evans as Anthony Preston

Anna Cheselka as Ballet Dancer

Vladimir Oukhtomsky as Ballet Dancer

Colin Kenny as Pub Patron

Bert Stevens as Ballet Audience Spectator

Arthur Tovey as Commuter at Terminal

Brandon Beach as Ballet Audience Spectator

James Forrest as Doorman

Gwenllian Gill as Nurse (uncredited)