Ellie Thomsen

Hayley Mills

Michael Rogers

Hywel Bennett

Greta

Britt Ekland

Andrew Lippincott

George Sanders

Santonix

Per Oscarsson

Dr. Philpott

Aubrey Richards

Reuben

Peter Bowles

Cora

Lois Maxwell

Mrs. Philpott

Ann Way

Miss Townsend

Patience Collier

Uncle Frank

David Bauer

Coroner

Geoffrey Chater

Sgt. Reene

Windsor Davies

Aunt Beth

Helen Horton

Constantine

Walter Gotell

Jason

David Healy

Michael's Mother

Madge Ryan

Innkeeper

Robert Keegan

Broker

Robert O'Neil

Broker

Robert A. O'Neil

Maynard

Mischa De La Motte

Second Auctioneer (uncredited)

Nicholas Courtney

Psychiatrist (uncredited)

Leo Genn

Man at Auction (uncredited)

Charlie Gray

Man at Auction (uncredited)

Victor Harrington

Workman (uncredited)

Jim Brady

Customer at Petrol Station (uncredited)

Ewan Roberts

Doctor in Rembrandt Painting Mock-up (uncredited)

Reg Thomason

Waiter (uncredited)

Russell Waters