Mark Hamill has revealed the grand prize for Disney/Lucasfilm's "Star Wars: Force for Change" charity fundraiser, announcing in a new video that the top donor will get to meet him in a free excursion to Star Wars Celebration Europe 2016 in London.

Here's a description of "Star Wars: Force for Change" from UNICEF's website:

"Star Wars: Force for Change, a charitable initiative from Disney and Lucasfilm, is dedicated to finding creative solutions to some of the world’s biggest challenges and empowers youth to be global forces for change in their own lives and for children around the world. This year, Star Wars: Force for Change will benefit UNICEF Kid Power.

When you donate to the U.S. Fund for UNICEF in support of Star Wars: Force for Change, you will support UNICEF Kid Power and help children around the world grow up healthy. Kid Power is an innovative program that empowers kids to get physically active using the world’s first Wearable-For-Good. Built for a new generation of global citizens, Kid Power inspires kids to take action and help save the lives of children in developing countries with every step they take."

Check out Hamill's grand prize announcement below:

Hamill next appears in "Star Wars: Episode VIII," which hits theaters on December 15, 2017.