Watch as Mark Hamill pranks unsuspecting Star Wars fans at Celebration 2017 to promote the “Star Wars Force for Change” charity. For those who choose to donate, all proceeds will benefit Starlight Children’s Foundation and UNICEF.

Mark Hamill channels Luke Skywalker and Darth Vader to surprise Star Wars fans and announce that he’s offering a BONUS experience: attend a pre-screening of The Last Jedi and get lunch with him in LA! For your chance to win the bonus prize, PLUS three epic Star Wars experiences, ENTER:

[Star Wars force for change: Win the Three Most Epic Star Wars Experiences Ever]