Julie Delpy (French: [ʒyli dɛlpi]; born 21 December 1969) is a French and American actress, screenwriter and film director. She studied filmmaking at NYU's Tisch School of the Arts and has directed, written, and acted in more than 30 films, including Europa Europa (1990), Voyager (1991), Three Colours: White (1993), the Before trilogy (1995, 2004, 2013), An American Werewolf in Paris (1997), and 2 Days in Paris (2007).

She has been nominated for three César Awards, two Online Film Critics Society Awards, and two Academy Awards. She moved to the United States in 1990 and became a US citizen in 2001.