Star Wars films really haven’t been the same since they started opening in December. But this year is different. Fans will be treated to the franchise’s second spinoff, Solo: A Star Wars Story. But before the film opens on Memorial Day weekend, fans will be celebrating May the 4th. You know, May the Force be with you. It’s a Jedi play on words.

So as we get closer to Solo‘s release, Disney and Lucasfilm have announced their latest charity campaign. Starting today, you can give out your best Chewbacca roar on social media. And if you use the #RoarForChange hashtag, Star Wars: Force for Change will donate $1, up to $1 million. More info and the video can be found below.

Last month we saw the announcement of another Force for Change collaboration between Star Wars and Omaze in which fans would have the chance to win the ultimate Star Wars experience while also supporting a great cause.

Now, just in time for May the 4th, a bonus prize for that contest has been revealed: the chance to have lunch with Mark Hamill in LA and see The Last Jedi before it opens to the public in a special pre-screening.

To help promote the contest and announce the bonus prize, Hamill recently shocked a handful of unsuspecting superfans when he showed up as their surprise co-star while re-creating iconic scenes from the movies. You can see their reactions in the video below, followed by all the details.

As expected, the big Star Wars announcement was just that, an announcement. No trailer, but an opportunity for fans to participate in Force For Change, a Star Wars-themed charity program that helps finds solutions for problems that affect the world.

Obviously, this means the trailer will be dropping during Star Wars Celebration, which happens to be this weekend. However, for those who are in a giving mood, you might want to check out what Daisy Ridley and Mark Hamill have to say in the video for the newest Force For Change campaign. Check it out below.