The Griswolds have grown up! A source confirms to E! News that Leslie Mann is in negotiations to play Audrey Griswold in New Line’s Vacation sequel. The actress will join previously announced cast members Christina Applegate and Ed Helms. According to The Hollywood Reporter, Charlie Day and Chris Hemsworth are also in talks with the studio. John Francis Daley and Jonathan Goldstein will make their directorial debut with the film. Shooting is scheduled to start next week in Louisiana.