Earlier this year, director J.J. Abrams along with Disney reached out to ‘Star Wars’ fans asking for donations for UNICEF. Every person who donated was entered into a special drawing to visit the set and have a small role in ‘The Force Awakens.’ The fundraising effort was a huge success, and now Abrams—along with the cast and crew—has delivered a new “thank you” video, featuring a couple of particularly special old friends.

In the video, the cast and crew thank fans from the set of ‘The Force Awakens’ for helping them raise $4.26 million for UNICEF through their “Star Wars: Force for Change” fundraiser. And that’s on top of the initial $1 million that Disney donated to kick off the campaign. That’s a lot of money to help UNICEF in their charitable endeavors.

The video features some neat behind the scenes moments including some use of green screen, but as cast members like Oscar Isaac and Andy Serkis have revealed in recent interviews, Abrams is very committed to using practical effects whenever and wherever possible—which should make for a film that’s more visually faithful to the original trilogy. You also get a special “thank you” appearance from both Chewbacca and R2-D2, and neither of them look any older than they did way back when.

J.J. Abrams himself concludes the video with a longer message of thanks, noting that “thousands of children all across the globe will benefit from UNICEF’s pioneering efforts to increase access to education, health resources and improved communication during emergencies for those who need it most”

‘Star Wars: The Force Awakens’ also stars John Boyega, Daisy Ridley, Gwendoline Christie, Domhnall Gleeson, Max Von Sydow, Adam Driver, and original stars Mark Hamill, Harrison Ford, and Carrie Fisher. The film hits theaters on December 18, 2015.