Big studios, film producers and directors use film festivals to promote their big movies that already have distribution deals. Since the audience in the film festivals are movie critics and film buffs, it's a great way to draw attention to their upcoming movies, which are usually big summer blockbusters or movies with big name stars starring in them. They usually do this by sending their movie's stars to the festival to mingle with the crowd and promote their movie. Sometimes, the celebrity power present in a film festival overshadow the featured festival films themselves, which is a shame. There are also instances when big studios or big movie stars pull stunts to get people's attention, usually at the expense of festival movies being screened. Having big celebrities in a film festival can be a good thing for festival hosts because they attract media attention, but it can also be a bad thing for the films being screened themselves.