Hawke was born on July 8, 1998, in New York City, the elder of two children born to American actors Uma Thurman and Ethan Hawke. Her parents met on the set of Gattaca (1997), married in May 1998, and divorced in 2005. Hawke's brother Levon was born in 2002. She also has two half-sisters by her father's second wife, Ryan Shawhughes: Clementine Jane (b. 2008) and Indiana (b. 2011). She has another half-sister, Altalune "Luna" Thurman-Busson (b. 2012), from her mother's ex-fiance, financier Arpad Busson.