The stars of the movie were joined at the event by writer/director Jonathan Levine, as well as their young co-stars Kiley and Brooke Liddell, and model Barbara Palvin.
The movie is about three lifelong friends, two of whom are Jewish, who spend the night in New York City looking for the Holy Grail of Christmas parties. The film hits theaters this Friday!
Also pictured inside: Seth making an appearance on Late Night with Seth Meyers that same night. More Here! »