Became known for her roles in the United States of Tara, Muriel's Wedding, and The Sixth Sense, About a Boy and The Hours. In 2018 she appeared in the films Please Stand By, Hereditary and Hearts Beat Loud.
She attended Australian Theatre for Young People and got her first acting gig in the play Godspell.
She won an Emmy Award and a Golden Globe Award for her work as the lead in The United States of Tara in 2010.
She married Dave Galafassi in 2003 and she has two children named Arlo and Sage.
She and Haley Joel Osment were nominated for Academy Awards for their roles in The Sixth Sense.