Justine Triet (French: [ʒystin tʁije]; born 17 July 1978) is a French film director, screenwriter, and editor. She has received several awards, including an Academy Award, a BAFTA Award, a Palme d'Or, three César Awards, and two Golden Globe Awards.

Triet started her career making documentary short films about social justice issues and commentary, starting with Sur Place (2007), which explored the 2006 youth protests in France. She made her narrative directorial feature film debut with the comedy-drama Age of Panic (2013), followed by the romantic comedy In Bed with Victoria (2016) and the drama Sibyl (2019).