Justin 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), First Man (2018), and Babylon (2022).

For La La Land, Hurwitz 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 and the BAFTA Award for Best Film Music. He won two more Golden Globes for Best Original Score for First Man and Babylon.