David Niven as Miles Doughton

Shirley MacLaine as Meg Wheeler

Gig Young as Evan Doughton

Rod Taylor as Ross Taford

Jim Backus as Mr. Maxwell

Claire Kelly as Lisa

Elisabeth Fraser as Jennie Boyden

Dodie Heath as Terri Richards

Read Morgan as Bert

Carmen Phillips as Refined Young Lady

Helen Wallace as Hotel Manager (uncredited)

Sandra Warner as Gabrielle (uncredited)

Larri Thomas as Bonny (uncredited)

Sandra Giles as Abbie (uncredited)

Barbara English as Clarissa (uncredited)

Jeanne Westmore as Candy (uncredited)

Reginald Simpson as Information Clerk (uncredited)

James Maloney as Moonface (uncredited)

Mickey Shaughnessy as Mr. Eager (uncredited)

Aileen Carlyle as Mrs. Rumple (uncredited)

Lela Bliss as Mrs. Webson (uncredited)

Wilson Wood as Detective (uncredited)

Robert Foulk as Lt. O'Shea (uncredited)

Percy Helton as Janitor (uncredited)

Albert Carrier as Etienne (uncredited)

Mae Clarke as Woman on Train (uncredited)