Ahh, child stars — they grow up so fast!

Madison De La Garza — best known for playing Eva Longoria’s daughter on ‘Desperate Housewives’ and Demi Lovato’s younger sister IRL — took to Instagram yesterday, March 9 to remind us she’s not the spunky little kid we remember seeing on TV!

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She’s 13-years-old now and growing into a stunning young lady — who happens to be more or less a clone of her 22-year-old sister (lucky her!).

The tween captioned the silly shot, “Weaknesses include: keeping hair out of our faces and taking selfies.” The photo has since been deleted.

In the past, Demi has been candid about her special relationship with her baby younger sis. She even came to her sister’s defense last September when Twitter bullies attacked her sister’s physical appearance (specifically, haters called Madison, who has scoliosis, “hunchback”).

And it’s clear you DON’T want to mess with this protective big sister!

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She tweeted, “For anyone telling me to ‘chill,’ the impact bullies have over the Internet can lead people to suicide. I can handle the bulls–t. But do NOT f–k with my baby sister. I’m all for peace and spreading love UNTIL you go after a 12-YEAR-OLD who did NOTHING to you… So disappointed that after all the conversation about cyber bullying in this world that people would continue to do this to others. [Maddie] you are BEAUTIFUL and the most precious little angel in my life and I will always protect you. I LOVE YOU.”

Oh boy… We can’t wait to see how Demi reacts when boys come knockin’ at Maddie’s door!

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