Andrew Barth Feldman began his acting career in musical theater by participating in local productions as a child. Feldman won a Jimmy Award for his high school's production of the musical Catch Me If You Can in 2018. In 2019, he played the title role in the musical Dear Evan Hansen on Broadway.
Feldman has also played a guest role in the television musical series High School Musical: The Musical: The Series in 2021 and expanded to films in 2023 with a supporting role in A Tourist's Guide to Love and a leading role in No Hard Feelings.