In anticipation for the upcoming release of Solo: A Star Wars Story and in celebration of Star Wars Day, Lucasfilm and Force for Change are unveiling a new hashtag campaign strategy to raise money for UNICEF. Starting today, May 3 and running until the movie premieres May 25, Star Wars: Force for Change will donate $1 for every social media post that uses the hashtag #RoarForChange.

In order to participate, upload a photo or video of yourself doing Chewbacca’s iconic roar — if you can’t quite nail it, you can always wear the Chewbacca mask or look for Chewbacca sounds on the DubSmash app. Then, challenge your friends to do the same thing. Lucasfilm will donate $1 to UNICEF for every post up to $1 million.

So what are you waiting for??? Go to twitter and instagram and #RoarForChange!