The Agatha Christie thriller The Mousetrap, which plays London's St. Martin's Theatre, celebrated its 30,000th performance in the West End March 19.

To mark the milestone, Guinness World Records adjudicator Will Munford presented the company with a certificate for the record title of Longest Theatrical Run, a title the whodunit has held for years.

Guinness Editor in Chief Craig Glenday states, “Guinness World Records has monitored this category from the very first edition in 1955. The Mousetrap overtook the previous holder in 1958, making it one of the all-time longest standing world records."

Producer Brian Fenty adds, “As The Mousetrap celebrates its record-shattering 30,000th performance, I’m reminded daily of the timeless genius behind Agatha Christie’s work and her landmark whodunit. It’s an honor to carry forward this legacy, proof that remarkable storytelling can unite audiences across generations—and endure for decades to come.”

The milestone matinee performance included an audience of over 400 children from schools across London.

The current cast includes Lara Lemon as Mollie Ralston, Harry Bradley as Giles Ralston, Richard Leeming as Christopher Wren, Rekha John-Cheriyan as Mrs. Boyle, Owen Oakeshott as Major Metcalf, Grace Darling as Miss Casewell, Alasdair Buchan as Mr. Paravicini, and Daniel Rainford as Detective Sgt. Trotter, Liv Koplick, Clive Marlowe, Richard Parnwell, Ben Riddle, and Cathryn Sherman. Philip Franks directs. Denise Silvey is the artistic director.

In the play, adapted from the novel of the same name, a group of seven strangers find themselves snowed in at Monkswell Manor as news spreads of a London murder. When a police sergeant arrives, the guests discover that a killer is in their midst.

The Mousetrap premiered at Theatre Royal Nottingham in 1952 and toured the U.K. before opening in the West End, where it is entering its 73rd year.

In 2022, it was announced that The Mousetrap would come to Broadway. The producers behind the West End production of the play initially said the work would bow on the Main Stem in 2023, but a Broadway production has yet to materialize.

The Mousetrap is produced by Brian Fenty. The genre-defining murder mystery is currently booking tickets through spring 2026.

Visit UK.The-Mousetrap.co.uk.