BEGIN SLIDESHOW Roar for Change UNICEF campaign announced by Lucasfilm Lucasfilm and Star Wars: Force for Change today announced Roar for Change, a global challenge in support of UNICEF. The initiative invites fans and families to share their own version of Chewbacca’s iconic roar. For each public post, like, or share on Facebook, Instagram or Twitter that includes #RoarForChange between May 3 – 25, 2018, Star Wars: Force for Change U.S.