Only Murders In The Building Season 6 Adds David Tennant, Nicola Coughlan, Jodie Whittaker and Jim Broadbent

Only Murders In The Building Season 6 is getting a major cast boost. David Tennant, Nicola Coughlan, Jodie Whittaker and Jim Broadbent are among the latest high-profile additions to Hulu’s hit mystery-comedy, with all four joining in recurring guest-star roles as the series heads into its first U.K.-set chapter. Variety also reported that Adrian Lukis, Richard Ayoade and Kathryn Hunter have joined the same wave of casting.

The new season is already shaping up to be one of the show’s biggest yet. Disney confirmed last October that Season 6 was renewed for 10 episodes and would send Charles, Oliver and Mabel overseas for the first time to investigate “London’s newest mystery.” Production is now underway in the U.K., with Variety noting that the trio will continue investigating the death of Cinda Canning after the Season 5 finale cliffhanger.

A major British-Irish expansion for Season 6

The casting of Tennant, Coughlan, Whittaker and Broadbent fits perfectly with the show’s London pivot. While exact character details are being kept secret — standard practice for Only Murders In The Building — the names alone suggest a season packed with eccentric suspects, scene-stealers and possible red herrings. Variety specifically said all seven of the latest additions are recurring guest stars.

Latest Only Murders In The Building Season 6 Cast Additions

All roles are being kept under wraps.

Who is returning?

The heart of the series remains intact. Steve Martin, Martin Short and Selena Gomez are all back as Charles-Haden Savage, Oliver Putnam and Mabel Mora, with Michael Cyril Creighton also returning. Disney’s renewal announcement confirmed the trio would lead the London mystery, while Variety added that Creighton is part of the returning lineup.

Season 6 also already had a stacked guest roster before this latest update. Variety previously reported additions including Martin Freeman, Geri Halliwell-Horner, Jamie Demetriou, Anjana Vasan, Jane Horrocks, Derek Jacobi and Lesley Nicol. Another wave included Sharon Horgan, Simone Ashley, Jennifer Saunders, Sean Teale, Amar Chadha-Patel, Rhea Norwood and Matthew Beard.

Core Returning Cast

Why these names matter

This is one of the most impressive talent waves the series has assembled, even by Only Murders standards. Tennant and Whittaker bring massive fan appeal from Doctor Who and British TV, Coughlan remains one of television’s most recognizable stars thanks to Bridgerton and Derry Girls, and Broadbent adds instant prestige and comic unpredictability. It also reinforces that Season 6 is leaning hard into a distinctly British flavor.

The London setting could also give the series a fresh energy after five New York-based mysteries. Disney’s official wording framed the move as the trio leaving New York City “to investigate London’s newest mystery,” which suggests the show is not just changing scenery but broadening its comic and mystery toolbox.

Release date status

There is still no official premiere date for Only Murders In The Building Season 6. Hulu’s press site currently lists Season 5 materials, while Disney’s renewal announcement and subsequent reporting only confirm that Season 6 is in production in the U.K. For now, fans know the mystery is coming — just not exactly when.

With David Tennant, Nicola Coughlan, Jodie Whittaker and Jim Broadbent joining an already crowded ensemble, Only Murders In The Building Season 6 is positioning itself as one of the most star-studded entries yet. The show has always thrived on clever casting, but this London-set season may be its boldest expansion so far.

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