It's officially Thursday Murder Club day, as the much-anticipated film adaptation of Richard Osman's novel series finally releases on Netflix today (Friday 22 August). As well as Thursday's premiere (21 August), the show's launch has been marked by a specially themed trail through RHS gardens.

One of the film's stars, Celia Imrie was there to test out the Thursday Murder Club-themed trail, which includes floral billboards, a scavenger hunt and a tearoom with treats inspired by the film's characters.

*** free for editorial use ***actress celia imrie unveils unveils netflix’ the thursday murder club: unearth the plot immersive experience at rhs garden wisley. visitors nationwide will enjoy a week of murderously good fun, with themed floral billboards, murder mystery trails and ‘joyce’s tearoom’ at wisley. picture date: thursday august 22, 2025. pinpep
Joe Pepler/PinPep

What to read next

A release explained there would be a 'Joyce-themed tearoom takeover at the iconic RHS Garden Wisley' which would 'offer character-inspired treats crafted in the style of Celia Imrie's fan-favourite portrayal.'

'Think Elizabeth's Earl Grey (with a twist) and Ibrahim's Calming Chamomile to Joyce's famous Lemon Drizzle and Ron's must-try Sausage Rolls,' it continued.

*** free for editorial use ***actress celia imrie unveils unveils netflix’ the thursday murder club: unearth the plot immersive experience at rhs garden wisley. visitors nationwide will enjoy a week of murderously good fun, with themed floral billboards, murder mystery trails and ‘joyce’s tearoom’ at wisley. picture date: thursday august 22, 2025. pinpep
Joe Pepler/PinPep

For her own visit to one of the RHS trails, Celia wore a silk floral shirt dress by Suzanna London. Sophie, the Duchess of Edinburgh previously wore a custom version of the same piece to Ascot earlier this year.

ascot, united kingdom june 18: (embargoed for publication in uk newspapers until 24 hours after create date and time) sophie, duchess of edinburgh attends day two of royal ascot at ascot racecourse on june 18, 2025 in ascot, england. (photo by max mumby/indigo/getty images)
Max Mumby/Indigo

Netflix's garden collaboration comes as a survey of 2,000 UK adults (commissioned by the streaming network) revealed that 'the mental workout of solving a 'whodunnit' is described as the ultimate wind-down for nearly half of Brits (47%), with one in three Brits now finding the prospect of solving a murder more relaxing than meditation.'

london, england august 21: (2l to r) maria fortese, geoff bell, suzanne heathcote, steven spielberg, richard osman, katy brand, holly bario, dame helen mirren, richard e. grant, pierce brosnan, paul freeman, naomi ackie, celia imrie, ingrid oliver, sir ben kingsley, jennifer todd, chris columbus, tom ellis, henry lloyd hughes, daniel mays and cassidy lange attend the uk premiere of "the thursday murder club" in leicester square on august 21, 2025 in london, england. (photo by dave benett/wireimage)
Dave Benett

Of course, Celia was also on the red carpet in London's Leicester Square for the new film's premiere yesterday evening. She was joined by her co-stars Dame Helen Mirren, Pierce Brosnan and Ben Kingsley, as well as other cast members.