Gavin Hunter Warren was born April 17, 2008 in Houston, Texas. He began his career as a model on Great Day Houston, a morning show that aired on KHOU 11, in 2015. He began his acting career after winning Most Sought After Male at the International Modeling and Talent Association Los Angeles Convention in 2015.

Warren is best known for his roles in the films First Man (2018), and Night Swim (2024), as well as his upcoming roles in the films The Unbreakable Boy (2025), Man in the White Van, and Geechee. On television, he guest starred on such shows such as Daybreak (2019), NCIS: New Orleans (2020), and Fear the Walking Dead (2023).

Warren played Neil Armstrong's (played by Ryan Gosling) son in First Man. The film is a personal account of Neil Armstrong and his 1969 landing on the Moon, and was directed by Damien Chazelle, the Academy Award-winning director of La La Land. Warren won the Red Carpet Fashion Award for best dressed for his outfit at the premiere of the film.

Warren also played Rusty in 12 Mighty Orphans (2021). In flashback scenes, he portrays the young version of the lead role played by Luke Wilson. The film also featured Robert Duvall, Martin Sheen, Vinessa Shaw, Wayne Knight, and Treat Williams. The film was written, directed and produced by Ty Roberts, and was based on the true story of an orphanage football team during the Great Depression.

Gavin is set to portray the character of Logan LeRette, brother to Austin, in the upcoming Lionsgate release, The Unbreakable Boy.