Emma Watson, Seth Rogen
Credit: Dan Steinberg/Invision/AP

Emma Watson (in Roland Mouret) reunited with her This is the End co-star, creator, and director Seth Rogen at the film's premiere, held at the Regency Village Theatre in Los Angeles. Watson, Rogen, and the rest of the cast members all play themselves in this faux-reality comedy, which follows six friends who are trapped at James Franco’s house after strange apocalyptic events occur while they're attending his party. The film opens June 12. Plus, click the photo for more photos from last night's parties!