Hayley Mills

Ellie Thomsen

Hywel Bennett

Michael Rogers

Britt Ekland

Greta

Per Oscarsson

Santonix

George Sanders

Andrew Lippincott

Aubrey Richards

Dr. Philpott

Ann Way

Mrs. Philpott

Patience Collier

Miss Townsend

Peter Bowles

Reuben

Lois Maxwell

Cora

David Bauer

Uncle Frank

Helen Horton

Aunt Beth

Madge Ryan

Michael's Mother

Windsor Davies

Sgt. Keene

Walter Gotell

Constantine

Geoffrey Chater

Coroner

David Healy

Jason

Robert Keegan

Innkeeper

Robert A. O'Neil

Broker

Mischa De La Motte

Maynard

Nicholas Courtney

Second Auctioneer (uncredited)

Leo Genn

Psychiatrist (uncredited)

Charlie Gray

Man at Auction (uncredited)

Victor Harrington

Man at Auction (uncredited)

Stephanie Mildenhall

Child (uncredited)

Jim Brady

Workman (uncredited)

Joe Phelps

Police Officer at Inquest (uncredited)

Ewan Roberts

Customer at Petrol Station (uncredited)

Reg Thomason

Doctor in Rembrandt Painting Mock-up (uncredited)

Steven Wallen

Young Michael (uncredited)

Russell Waters

Waiter (uncredited)