Raegan Revord knows she can count on her Young Sheldon ... on set," including one thoughtful gesture from her costar Iain Armitage, who plays the titular character on the series.

What kind of bond did you form with Iain Armitage? Raegan Revord: It's been amazing. I've said this a lot, but I'm an only child. I have four dogs but it doesn't really count as siblings ...

Iain Armitage showcased immense talent at a very young age with his nuanced performance as Sheldon Cooper in Young Sheldon.

With Jim Parsons, Iain Armitage, Montana Jordan, Lance Barber, Zoe Perry, and Raegan Revord. Produced by Chuck Lorre Productions. Airs on CBS. Shoots in Los Angeles.