Raegan Revord, who plays Missy Cooper on Young Sheldon, is growing up right before fans' eyes. Here's what to know about Raegan's life on and off-screen.

You likely know Raegan Revord from her breakout role as Missy Cooper, the snarky twin sister of Sheldon Cooper (Iain Armitage) on seven seasons of the CBS hit Young Sheldon.What you may not know ...

But the cast of "Young Sheldon" takes the cake on an incredible evolution since Season 1. Raegan Revord, who played Missy Cooper on the CBS hit sitcom, is particularly growing up in warp speed.

You likely know Raegan Revord from her breakout role as Missy Cooper, the snarky twin sister of Sheldon Cooper (Iain Armitage) on seven seasons of the CBS hit Young Sheldon.What you may not know ...