Justin Gabriel Hurwitz (born January 22, 1985) is an American film composer and a television writer. He is best known for his longtime collaboration with director Damien Chazelle, scoring each of his films: Guy and Madeline on a Park Bench (2009), Whiplash (2014), La La Land (2016), and First Man (2018).
He won two Academy Awards: Best Original Score and Best Original Song (for "City of Stars") as well as the Golden Globe Awards for Best Original Score and Best Original Song (for "City of Stars") for La La Land, and the BAFTA Award for Best Film Music. For First Man, he won the Golden Globe Award for Best Original Score.
Hurwitz was born in California, the son of Gail (née Halabe), a professional ballet dancer turned registered nurse, and Ken Hurwitz, a writer. He is of Jewish heritage (from Russia, Poland, Damascus in Syria, and Beirut in Lebanon). His family moved to Wisconsin in 1998 where he attended Nicolet High School.