The Sundance Film Festival has announced two surprise screenings which will be added to the 2001 lineup - Daniel Waters' Happy Campers and Cheryl Dunye's Stranger Inside.

Happy Campers, financed and distributed worldwide by New Line Cinema, is the directorial debut of Waters. It stars Brad Renfro, Dominique Swain, James King, Jordan Bridges, Emily Bergl, Justin Long and Keram Malicki-Sanchez as a diverse team of counsellors who take over Camp Bleeding Dove after their tyrannical director (Peter Stormare) is accidentally incapacitated. It premieres on Jan 21 at 3pm in the Eccles Theatre.

Dunye, whose credits include The Watermelon Woman and Greetings From Africa, directs Stranger Inside, the story of a reunion between a mother and daugther in a woman's correctional facility. Starring Yolonda Ross and Davenia McFadden, the film premieres Jan 24 at 11.30am at the Prospector Theatre.

Sundance had also announced before Christmas that The Dangerous Lives Of Altar Boys starring and produced by Jodie Foster has been pulled from the lineup since it is not completed. Instead Fine Line Features' The Invisible Circus starring Jordana Brewster, Christopher Eccleston and Cameron Diaz will take its place as centrepiece premiere. Based on the novel by Jennifer Egan, the film is directed by Adam Brooks and opens domestically on Jan 26 after the Sundance premiere.