Paul Mitchell

Dennis O'Keefe

Mary Mason

Coleen Gray

Sir Richard Aldingham

Hugh Williams

Smith

Guy Middleton

Henry Mason

John Laurie

Peter Randall

Gerald Case

Pavement Artist

Eliot Makeham

Weston

Seymour Green

Cartwright

Stanley van Beers

Cartwright

Stanley Van Beers

Miss Fossett

Ellen Pollock

Barmaid

Dora Bryan

Pettigrew

Morris Sweden

Bearded Tramp

Philip Ray

Police Inspector

Arnold Bell

Art Salesman

Michael Ward

Lodging House Keeper

Clifford Buckton

Boy Student

Leslie Phillips

Girl Student

Marianne Noelle

Waitress

Billie Whitelaw

2nd Thug

John Wadham

Schoolteacher

Beatrice Kane

uncredited

Guy Deghy

Tate Gallery Attendant

Frank Atkinson

uncredited

Tom Clegg

uncredited

Harold Sanderson

Tate Gallery Attendant

Johnnie Schofield

Tate Gallery Attendant

Leonard Sharp

Art Gallery Visitor (uncredited)

Hyma Beckley

Museum Visitor (uncredited)

Norman Fisher

Art Gallery Visitor (uncredited)

Robert Gregory

Thug

Joe Wadham

Museum Visitor (uncredited)

Dido Plumb