Young Sheldon' starred Iain Armitage as the younger version of Jim Parsons' character Sheldon Cooper from 'The Big Bang ...

The comedy series Young Sheldon aired from 2017 until 2024. As a kid genius in Texas, Sheldon Cooper was the focus of this spin-off of The Big Bang Theory.

That's part of why "Big Bang Theory" creator Chuck Lorre, who'd later go on to create "Young Sheldon," expressed some regret ...