Gavin Warren was born in Houston, Texas in 2008, the youngest son of a family of five. As a child he played the piano and did gymnastics before, inspired by Adam Sandler, he decided he wanted to become an actor. In 2015, Warren won an acting and modeling competition, after which he was accepted into a local artist agency. This was followed by his first roles in the short film Two Wongs Make a White and in the film drama Back Roads, before Warren was seen in Damien Chazelle's film biography Awakening to the Moon alongside Ryan Gosling in 2018.