Cast of the West End production of The Mousetrap

The Mousetrap is the longest running play in the world. The cast has changed numerous times.

Since the retirement of Mysie Monte (in 1967) and David Raven (in 1968), who each made history by remaining in the cast for more than 11 years, in their roles as Mrs Boyle and Major Metcalf, the cast has been changed annually. The change usually occurs around late November around the anniversary of the play's opening, and was the initiative of Sir Peter Saunders, the original producer. There is a tradition of the retiring leading lady and the new leading lady cutting a "Mousetrap cake" together.

The recorded voice of actor Deryck Guyler has been used since the first performance in 1952, as the voice reading the radio news bulletin.

Original 1952 cast
The original West End cast included:
 * Sheila Sim as Mollie Ralston
 * John Paul as Giles Ralston
 * Allan McClelland as Christopher Wren
 * Mignon O'Doherty as Mrs Boyle
 * Aubrey Dexter as Major Metcalf
 * Jessica Spencer as Miss Casewell
 * Martin Miller as Mr Paravicini
 * Richard Attenborough as Detective Sergeant Trotter

1959-1960 production

 * Heather Chasen as Mollie Ralston
 * James Grout as Giles Ralston
 * Anna Barry as Mrs Boyle
 * Lisa Rayne as Miss Casewell
 * Edward Waddy as Mr Paravicini
 * David Aylmer
 * Peter French
 * Anthony Oliver

1960-1961 production

 * Peter Boyes
 * Janet Hargreaves
 * Kerry Jordan
 * Michael Martin Harvey
 * Lorraine Peters
 * Madoline Thomas
 * Gordon Whiting

1962-1963 production

 * Margo Jenkins as Mollie Ralston
 * Michael McClain as Giles Ralston
 * Simon Brent as Christopher Wren
 * Elizabeth Bird as Mrs Boyle
 * Brian McDermott as Major Metcalf
 * Brenda Kempner as Miss Casewell
 * Otto Diamant as Mr Paravicini
 * Mark Kingston as Detective Sergeant Trotter

1964-1965 (13th year) production

 * Irene Sutcliffe as Mollie Ralston
 * Mysie Monte as Mrs Boyle
 * David Raven as Major Metcalf
 * Alison McMurdo as Miss Casewell
 * Ray Cooney as Detective Sergeant Trotter
 * Peter Beton
 * John Ingram
 * John Hart Dyke

1967 (15th year) production

 * David Pinner as Detective Sergeant Trotter
 * Valerie Hermanni
 * Ernst Ulman
 * Brian Spink

1968-1969 production

 * Stephanie Cole as Miss Casewell
 * Anne Godley
 * Neville Barber
 * Christopher Dunham
 * Dorothy Batley
 * Hugh Moxey
 * Gabor Vernon
 * Ian Cullen

1970 (18th year) production

 * Ann Kennedy as Mollie Ralston
 * Richard Blomfield as Giles Ralston
 * Richard Bartlett as Christopher Wren
 * Betty Turner as Mrs Boyle
 * Lee Fox as Major Metcalf
 * Zeph Gladstone as Miss Casewell
 * Robert Webber as Mr Paravicini
 * Dan Caulfield as Detective Sergeant Trotter

1976 production

 * Brian McDermott as Detective Sergeant Trotter
 * Mary Law
 * Brian Spink
 * Mark Christon
 * Mary Hignett
 * Geoffrey Colvile
 * Patricia Samuels
 * Alan Gerrard

1978 (26th year) production

 * Victor Madden as Mr Paravicini
 * Christopher Leaver as Detective Sergeant Trotter
 * Richard Warner
 * Pamela Buchner

1982 production

 * Mary Tempest as Mollie Ralston
 * Malcolm Bullivant as Giles Ralston
 * Martin Weedon as Christopher Wren
 * Margaret Ingils as Mrs Boyle
 * Derek Bond as Major Metcalf
 * Sally Goodman as Miss Casewell
 * Barry Martin as Mr Paravicini
 * Michael Deacon as Detective Sergeant Trotter

1986 production

 * Jane Bolton as Mollie Ralston
 * John Pine as Giles Ralston
 * Robin Langford as Christopher Wren
 * Joan Geary as Mrs Boyle
 * Robert Gladwell as Major Metcalf
 * Elizabeth Lynne as Miss Casewell
 * David Lloyd Meredith as Mr Paravicini
 * Colin Gourley as Detective Sergeant Trotter

1986-1987 production

 * Doreen Andrew
 * Nicholas Courtney
 * Brian Darnley
 * Terrick Fitzhugh
 * Marcia King
 * Diana Marchment
 * Bill McCabe
 * Jamie Ripman

1990-1991 (39th year) production

 * Darren Bennett
 * Tony Boncza as Detective Sergeant Trotter
 * David Evans as Giles Ralston
 * Paul Imbusch as Mr Paravicini
 * Cheryl Kennedy as Miss Casewell
 * Pamela Lane as Mrs Boyle
 * Madeline Smith as Mollie Ralston
 * Nicholas Smith as Major Metcalf
 * Paul Wimsett

1992-1993 (41st year) production

 * Judy Hopton as Mollie Ralston
 * Kenneth Price as Giles Ralston
 * Philip Wrigley as Christopher Wren
 * Margaret Ashcroft as Mrs Boyle
 * Michael Wynne as Major Metcalf
 * Karen Davies as Miss Casewell
 * Julian Battersby as Mr Paravicini
 * Dominic Kemp as Detective Sergeant Trotter

1993-1994 production

 * Nicholas Courtney

1998 production

 * Bryonie Pritchard as Mollie Ralston
 * Andrew Ryan as Giles Ralston
 * Mark Hayden as Christopher Wren
 * Janet Hargreaves as Mrs Boyle
 * Jon Cartwright as Major Metcalf
 * Angie Smith as Miss Casewell
 * John Fleming as Mr Paravicini
 * Joseph Morton as Detective Sergeant Trotter

25,000th performance and the 60th year of the production celebration cast
On 18th November 2012, both the 25,000th performance and the 60th year of the production were marked by a special, charity performance that featured Hugh Bonneville, Patrick Stewart, Julie Walters and Miranda Hart. It was directed by Phyllida Lloyd. The money raised by the performance went towards Mousetrap Theatre Projects.
 * Hugh Bonneville as Giles Ralston
 * Tamsin Greig as Mollie Ralston
 * Iain Glen as Detective Sergeant Trotter
 * Miranda Hart as Miss Casewell
 * Nicholas Farrell as Major Metcalf
 * Harry Lloyd as Christopher Wren
 * Patrick Stewart as Mr Paravicini
 * Julie Walters as Mrs Boyle

2021 production
When West End theatres opened again after the Covid-19 epidemic, two different cast performed the play. One of the casts was called "classic" performed until 11 July 2021 on 17-19 May, 28 May-3 June, 11-17 June, 25 June-1 July, and 9-11 July. The other cast performed on 20-27 May, 4-10 June, 18-24 June, and 2-8 July.

Cast 1

 * Cassidy Janson as Mollie Ralston
 * Danny Mac as Giles Ralston (until 13 June)
 * Adam Lilley as Giles Ralston (after 13 June)
 * Alexander Wolfe as Christopher Wren
 * Susan Penhaligon as Mrs Boyle
 * Derek Griffiths as Major Metcalf
 * Lizzie Munsey as Miss Casewell
 * David Rintoul as Mr Paravicini
 * Paul Hilliar as Detective Sergeant Trotter

Cast 2

 * Kate Tydman as Mollie Ralston
 * Nicholas Bailey as Giles Ralston
 * Joshua Griffin as Christopher Wren
 * Louise Jameson as Mrs Boyle
 * Paul Bradley as Major Metcalf
 * Sarah Moss as Miss Casewell
 * Tony Timberlake as Mr Paravicini
 * Charles Clements as Detective Sergeant Trotter

Understudies

 * Elliot Coombe understudy Christopher Wren
 * Paddy Duff understudy Giles Ralston and Detective Sergeant Trotter
 * Clive Marlowe understudy Major Metcalf and Mr Paravicini
 * Emily-Jane McNeill understudy Mollie Ralston and Miss Casewell
 * Audrey Palmer understudy Mrs Boyle

2022 production

 * Nicola Agada as Mollie Ralston
 * Daniel Fraser as Giles Ralston
 * Elliot Clay as Christopher Wren
 * Nicola Blackman as Mrs Boyle
 * Damien Matthews as Major Metcalf
 * Sarah Moss as Miss Casewell
 * Philip Voyzey as Mr Paravicini
 * Sam Ebenezer as Detective Sergeant Trotter

Understudies

 * Essie Barrow understudy Mollie Ralston and Miss Casewell
 * Stefan Gough understudy Christopher Wren
 * Jason Hall understudy Major Metcalf and Mr Paravicini
 * Clive Marlowe understudy Major Metcalf and Mr Paravicini
 * Pamela Hardman understudy Mrs Boyle
 * Phoebe Newlan understudy Mollie Ralston and Miss Casewell
 * Richard Parnwell understudy Giles Ralston and Detective Sergeant Trotter
 * Ben Riddle understudy Giles Ralston and Detective Sergeant Trotter