“Star Wars” fans almost lost their minds when they were surprised by Mark Hamill on set.

To honor the celebration of Star Wars Day, Mark teamed up with Omaze to promote the new “Force the Change” fundraiser, which aids UNICEF and Starlight Children’s Foundation.  Pretty awesome!

The video shows Mark acting out scenes with fans of the franchise yet they have no idea that Mark is their co-star until he reveals himself.

The video is pretty epic!  Take a look: