Here’s a curious (vaguely creepy) detail about the making of MARTHA MARCY MAY MARLENE, directed by Sean Durkin and starring Elizabeth Olsen (in a breakout role — the New York Post is calling her “the new supernova in the Sundance galaxy”) as a girl who escapes from a cult in the Catskills and struggles to leave her psychological scars behind.

From USA Today:

Olsen said the cast lived together communally during shooting on the upstate New York farm where much of the action takes place. There were no cellphones, only a single land line. In the evenings they would pass a guitar around — not unlike the cult depicted in the film.

The film debuted Friday at the Sundance Film Festival in the U.S. Dramatic Competition.

Be sure to satisfy all your festival needs with the latest buzz, top stories, and celebrity interviews from Sundance Channel’s coverage of the 2011 Sundance Film Festival.