David Tennant is reported to be joining the cast of the American comedy series Only Murders in the Building, alongside other newly announced performers. The Belfast Telegraph and The Mirror both describe Tennant’s involvement and frame it as part of a wider stream of guest casting. Both outlets also note that the show already features a range of well-known actors. In addition, The Mirror specifically says that former Doctor Who co-star Jodie Whittaker is among the latest stars to join the series. The reports characterize the casting additions as bringing in actors with recognizable public profiles, including fellow Doctor Who performers. The coverage does not provide details on the characters Tennant or other new cast members will play, nor does it specify episode titles, release dates, or how the casting will connect to existing storylines. Overall, the sources agree on the central point that Tennant is joining Only Murders in the Building and that additional high-profile actors, including Whittaker as noted by The Mirror, are also joining the cast as part of the current announcements.