Jim Kaplan made his professional acting debut at the age of 9 in the Tony Award-winning revival of The King and I at Lincoln Center Theater. He then played Lawrence in the Broadway production of School of Rock, Eric in the national tour of Matilda, and Jason in the national tour of The Falsettos. On screen, he can be seen in the Universal Pictures film The Wedding Survival (2022) and in director Alexander Payne's feature film The Holdovers (2023).