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).For La La Land, 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"), and the BAFTA Award for Best Film Music.