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Jansen Panettiere, Instagram


Jansen Panettiere is all grown up!

We were first introduced to Hayden Panettiere's adorable little brother when he starred in Disney's Tiger Cruise (11 years ago!), but her sibling is about to turn 21 years old in September and you will not believe how grown up he is.

Jansen, who continues to expand his acting career and currently has three projects in post-production (according to his iMDB page), has become quite the handsome young man.

And there's no doubt that Jansen has some striking similarities to his older sis (that smiles and those curls!). You might also remember seeing the young celeb in films such as Robots, The Last Day of Summer and The Forger.

Back in 2013, he also guest-starred on an episode of the TNT hit show Major Crimes.

Aside from acting, Jansen is also an entrepreneur. According to Facebook, he's the co-founder of Abstract Charms, which sells "hand crafted artisan indie jewelry and accessories."

Jansen Panettiere, Hayden Panettiere

Kevin Mazur/WireImage

???? T H R O W B A C K ???? #whenihadhighlights #tbt #baby #family

A photo posted by Jansen Panettiere (@jansenbaker) on