Aidan Gallagher ni muigizaji wa Marekani ambaye anaigiza kwenye kampuni ya Nickelodeon. kabla ya kuwa muigizaji wa nickelodeon alishawahi kuigiza movie inayoitwa "you and me": movie hiyo haikuwa maarufu sana wala kuangaliwa na watu wengi hivyo akaamua kujiunga na nickelodeon akashirikishwa kwenye movie iitwayo Nicky, ricky, dicky & dawn ambamo yeye alichukua sehemu ya nicky harper. Movie nyingine ambazo ameshawahi kuigiza ni: 2013 Modern Family Alec Episode: "The Wow Factor"; uncredited 2013 Jacked Up Evan Pilot (unaired) 2014–2018 Nicky, Ricky, Dicky & Dawn Nicky Main role 2015 Nickelodeon's Ho Ho Holiday Special Himself Television film 2017 Nickelodeon's Sizzling Summer Camp Special Beach Guy Television film; cameo 2019–sasa The Umbrella Academy Number Five / The Boy Main role