Marielle Heller's first feature film The Diary of a Teenage Girl, which she directed and wrote (adapted from the novel by Phoebe Gloeckner), has premiered and won awards at the Sundance Film Festival, Berlinale, Edinburgh Film Festival, and more all over the world. It was well received at Sundance and quickly scooped up by Sony Picture Classics.

Marielle has been honored with numerous fellowship opportunities for her work including the 2012 Sundance Screenwriting Fellowship and Directing Fellowship, the Lynn Auerbach Screenwriting Fellowship and the Maryland Film Festival Fellowship. She recently was awarded Sundance Institute's prestigious Vanguard Award, along with Alejandro Inarritu. She made her commerical debut in 2015 with a Kate Spade holiday campaign starring Anna Kendrick.

Also an actress, Marielle has made appearances in numerous television series and films and has performed at theaters all over the world. She currently resides in New York with her husband and son.