Guess Who This Lil' Blondie Turned Into!

Before this blonde curly-haired cutie turned into an American actress, she was just snappin' cute photos as a child model, snuggling with her Teletubbies and growing up with her twin bro ... and younger bro.

She attended school in New York City and was a serious dancer! She took on a minor role in "27 Dresses" with Katherine Heigl but is most known for her roles in "Jessie," "Diary of a Wimpy Kid" ... and she fought alongside Ralph Macchio!

Need one more clue? She's got over 20 million Instagram followers.