Hey M Girls!
Does this shy sweetie look familiar?
Hint: She's now a star actress on Disney Channel!
Click "Read More" for the big reveal!
It's Jessie's Debby Ryan!
Let's dish: - Did YOU guess right?!
And pick up M's January/February issue for more pictures of your fave stars when they were growing up! We have all the deets on what the celebs were like in school -- you can get your copy now!
Photos courtesy of Twitter and Disney Channel