Kevin Sussman (Stuart) and recurring guest stars Brian Posehn (Bert) and Lauren Lapkus (Denise) have signed on to star in a The Big Bang Theory spin-off being developed for the streaming service Max, according to a report from Deadline.com.

This potential spin-off from TBBT creator Chuck Lorre was first reported in April last year, shortly before the writers’ and actors’ strikes that brought Hollywood to a standstill. In November, Lorre explained the project was still in a “pre-natal” stage.

No details about the show's storyline or format have been confirmed, with Deadline cautioning that it remains in the early stages of development. A script is still being written, and there is no certainty this project will make it to series.

Kevin Sussman first appeared as Stuart Bloom, the owner of the guys’ favorite comic book store, in the Season 2 episode "The Hofstadter Isotope". Sussman was a recurring guest star for the next few seasons, before becoming a series regular for Season 6 and Seasons 8-12. In total, he appeared in 84 episodes during the show’s run.

Brian Posehn first guest starred as Bert in the Season 6 episode "The Contractual Obligation Implementation", where he gate-crashed Raj and Lucy’s "silent date" at the library. When he returned in the seventh season, Bert was revealed to be a geologist at the university who had a crush on Amy. Posehn reprised his role as Bert for a further thirteen episodes in the show’s last three seasons.

Lauren Lapkus appeared in eight episodes of the show’s final two seasons as Denise, an employee at Stuart’s comic book store with whom he strikes up a relationship.

The Big Bang Theory has already spawned one successful spin-off with Young Sheldon, which concluded its seven-season run earlier this year. Young Sheldon is now launching its own spin-off, Georgie and Mandy’s First Marriage, which premieres Thursday, October 17 on CBS.

Max has been the exclusive streaming home of The Big Bang Theory in the United States since its launch in 2020.