Baghead

Baghead is a 2008 comedy horror film written and directed by Jay Duplass and Mark Duplass.

Plot
Four actors--Matt (Ross Partridge), Catherine (Elise Muller), Michelle (Greta Gerwig), and Chad (Steve Zissis)--attend an art festival and watch a low-budget movie directed by Jett (Jett Garner). After the showing, Jett explains to them that he kept the budget so low by not telling his actors they were in a movie until the final piece was ready. The group then goes to an after party; however, Matt is unable to gain entry into the club after not wanting to appear desperate by asking his old friend Jett to get him in. The four actors go to a different bar, where they decide to go to Chad's isolated cabin in the woods to write their own movie to star in, since they were fed up having only been cast as extras.