The Mousetrap, the world’s longest-running play, is set to celebrate its 75th year in the West End with new cast members, a fresh director, updated designs, and a major theatre refurbishment. This marks a significant moment for the enduring Agatha Christie murder mystery.

The Mousetrap will enter its 75th year at St Martin’s Theatre on 25 November 2026, with a new West End company commencing performances on 11 November under the direction of Hannah Chissick. The milestone will be commemorated with a gala performance on the anniversary date.

The refreshed cast features Marcus Adolphy as Major Metcalf, Jonathan Cobb as Detective Sergeant Trotter, Rosa Coduri-Fulford as Miss Casewell, Dean Graham as Mr Paravicini, Dan Nicholson as Giles Ralston, Jake Rory as Christopher Wren, Gay Soper as Mrs Boyle, and Sarah Twomey as Mollie Ralston. Hannah Chissick, who currently directs the production’s UK and Ireland tour, leads the new West End ensemble.

Creative updates include set design by Walt Spangler, lighting by Nic Farman, and sound design by Max Perryment. The wider creative team comprises casting director Marc Frankum, fight and intimacy director Maisie Carter, costume supervisor Caroline Hannam, associate lighting designer Nicola Crawford, and resident director Myles Brown.

Concurrently, St Martin’s Theatre will undergo significant refurbishment led by Studio Shayne Brady, focusing on redesigned bars and decorative details across the stalls, dress circle, and upper circle. A new cocktail menu for the venue will be created by Mr Lyan Studio.

Producer Brian Fenty described the investment as a commitment to both the production and its historic home, aiming to preserve the original spirit of Agatha Christie’s storytelling. He emphasised the importance of maintaining the wit, atmosphere, and suspense that have captivated audiences since 1952.

The Mousetrap originated from Christie’s radio play Three Blind Mice, first broadcast in 1947, before opening in the West End on 25 November 1952. It follows a group of strangers trapped by snow at Monkswell Manor, where a police sergeant investigates a murder.

Alongside its continuous run at St Martin’s Theatre, The Mousetrap continues touring the UK and Ireland. Notably, it remains one of only two plays written by women currently running in London’s West End, underscoring its unique place in theatre history.