Sound of My Voice is an American psychological thriller about a supposed cult directed by Zal Batmanglij. The film was co-written by Zal Batmanglij and Brit Marling. It premiered at the 2011 Sundance Film Festival. It was also selected as part of the 2011 SXSW Film Festival. The film was released by Fox Searchlight Pictures on April 27, 2012. The first 12 minutes of it may be previewed on soundofmyvoicemovie.com.

The film was also named among the Top Indie Films at Festivals in 2011 on IndieWire's criticWIRE.

Manohla Dargis writes in her review in The New York Times: "Nobody is gutted in “Sound of My Voice,” a smart, effectively unsettling movie about the need to believe and the hard, cruel arts of persuasion. But over time the men and women who meet in a mysterious house in an anonymous Los Angeles neighborhood — where they shed their clothes and cleanse their bodies in a ritual — are opened up bit by bit, wound by wound, until they’re sobbing and laughing, their insides smeared across the carpet."

It is rated R for language including some sexual references, and brief drug use.