Justin Hurwitz (born January 22nd, 1985) is an American film composer and 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 Golden Globe Awards for Best Original Score and Best Original Song and the BAFTA Award for Best Film Music. He has won two Grammy Awards for La La Land, one for Best Compilation Soundtrack For Visual Media and another for Best Score Soundtrack For Original Media. He won two additional Golden Globes for Original Score for First Man and Babylon.