Sound of My Voice is a 2011 American psychological thriller film directed by Zal Batmanglij in his feature directorial debut from a script written by Batmanglij and Brit Marling, and starring Christopher Denham, Nicole Vicius and Marling. The plot focuses on two documentary filmmakers who attempt to expose a cult led by a charismatic leader (Marling) who claims to be from the future.

Zal Batmanglij is an American film director and screenwriter. He directed and co-wrote the 2011 film Sound of My Voice and the 2013 film The East, both of which premiered at the Sundance Film Festival, as well as the Netflix series The OA, which debuted in 2016.