Agatha

Dustin Hoffman

As Wally Stanton

Vanessa Redgrave

As Agatha Christie

Timothy Dalton

As Archie Christie

Helen Morse

As Evelyn

Celia Gregory

As Nancy Neele

Paul Brooke

As John Foster

Carolyn Pickles

As Charlotte Fisher

Timothy West

As Kenward

Tony Britton

As William Collins

Alan Badel

As Lord Brackenbury

Robert Longden

As Pettelson

Yvonne Gilan

As Mrs. Braithwaite

Sandra Voe

As Therapist

Barry Hart

As Supt. MacDonald

David Hargreaves

As Sgt. Jarvis

Tim Seely

As Capt. Rankin

Christopher Fairbank

As Luland

Liz Smith

As Flora

Peter Arne

As Hotel Manager

Hubert Rees

As Official at Literary Luncheon

Donald Nithsdale

As Uncle Jones

Jill Summers

As Nancy's Aunt

Geoff Tomlinson

As Hotel Receptionist

John Joyce

As Hotel Waiter

Irene Sutcliffe

As Dress Shop Manageress

Ann Francis

As Jane

Hope Johnstone

As Royal Baths Clerk

John Ludlow

As Royal Baths Clerk

Ray Gatenby

As Official at Literary Luncheon

Tommy Hunter

As Pierrot

Bert Ward

As Pierrot

Harry Segal

As Pierrot

Harry Segall

As Hotel Trio

Jim Archer

As Hotel Trio

Reginald Kilbey

As Hotel Trio

Jonathan Benson

As Head Waiter (uncredited)

Harry Fielder

As Policeman (uncredited)

Tony Haygarth

As Man Drinking Tea (uncredited)

Juba Kennerley

As Gent Watching Billiards (uncredited)

Breandán O'Connor

As Bellboy (uncredited)

Stan Richards

As Hotel Porter (uncredited)

Pamela Austin

As Pierrot