Towne was born in Santa Monica, California, to an American father and French mother.
[1] Towne has appeared in a number of minor roles in film and television, including Havoc in 2005, Gilmore Girls in 2007 and The Selling in 2011.
Towne made her directorial debut in 2013 with I Am I, followed in 2014 by We'll Never Have Paris, co-directed with Simon Helberg.
[2] Towne married actor Simon Helberg on July 7, 2007.
They have a daughter Adeline,[3] and a son, Wilder Towne Helberg.