Angelina Jolie's daughter spotted working as usher at the Reefer Madness: The Musical reunion concert on Tuesday, July 30.
The event was held at The Whitley in Hollywood, California. Spencer Liff is in charge of directing and choreographing.
Vivienne was busy showing people to their seats.
Original cast members from Reefer Madness made special appearances at the event, including Kristen Bell, Harry S. Murphy, Lori Alan, Christian Campbell, John Kassir, Myles Breckel and more