Hamill revealed his disguises on Twitter, revealing he'd be wearing one of four masks each day at SDCC 2019 and asking fans to "please say hello when you see me." Of the four masks, two are of his Star Wars character Luke Skywalker, one young and one old. The other two are of Joker, whom he first played in Batman: The Animated Series, and Skips from Regular Show.
Would I lie about being in disguise at #SDCC? Sorry- I misspoke & said I "would" instead of "wouldn't" FUN FACT: I'M HERE RIGHT NOW!! Here are the 4 masks I'll be wearing (1 for each day) so be on HIGH ALERT & please say hello when you see me!👍😜 #MaskedMark pic.twitter.com/QVfZ34fIM0— Mark Hamill (@HamillHimself) July 19, 2018
Hamill first played Luke in 1977's Star Wars and went on to reprise the role for the rest of the original trilogy and the sequel trilogy. The actor then went on to play The Joker in Batman: TAS, which ran from 1992-1994. However, he's reprised the role on many occasions since then, and his voice is often synonymous with the character. Regular Show ran from 2010-2017 and featured Hamill's talents in 162 episodes.
Directed and co-written by J.J. Abrams, Star Wars: The Rise of Skywalker stars Daisy Ridley, Adam Driver, John Boyega, Oscar Isaac, Lupita Nyong’o, Domhnall Gleeson, Kelly Marie Tran, Joonas Suotamo, Billie Lourd, Keri Russell, Anthony Daniels, Mark Hamill, Billy Dee Williams and Carrie Fisher, with Naomi Ackie and Richard E. Grant. The film arrives Dec. 20.