Aidan Gallagher
20 years old
Aidan Gallagher (born September 18, 2003) is an American actor, best known for his role as Nicky Harper on the Nickelodeon series Nicky, Ricky, Dicky and Dawn (2014-2018).
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The Marauders
No actors over 30 (sorry, Aaron-Taylor Johnson, Ben Barnes, Andrew Garfield, and Dane DeHaan).
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