Stuart Fails to Save the Universe will mark the third spinoff in The Big Bang Theory TV franchise, along with Young Sheldon — ...

Actor Iain Armitage became famous at the age of eight for playing Sheldon Cooper in 'Young Sheldon,' a spin-off of 'The Big Bang Theory' that aired from 2017 to 2024.

Stuart Fails to Save the Universe is the newest spin-off in the growing The Big Bang Theory universe, and it focuses on Stuart, the owner of the comic book shop.

Fans called him “Shelly,” an endearing term used by Sheldon Cooper’s mom, played by Zoe Perry. “Happy Birthday, Iain. Shelii,” one wrote. “Enjoy yourself, Shelly! HBD,” a follower added.