While he stole the show returning as Luke Skywalker in the Sequel Trilogy and The Mandalorian, Mark Hamill also voiced characters in all of the recent Star Wars projects, and replying to a post by Wookieepedia he reiterated this very cool fact, adding to the news last year that he had been billed as William M. Patrick, therefore not taking the high-profile billing that he easily could have, or any financial reparation – he did it because he loves easter eggs.
As Mark says, we know he was EV-9D9 in The Mandalorian episode The Gunslinger, voiced Boolio at the start of The Rise of Skywalker and the drunken Dobbu Scay in The Last Jedi but as yet we don’t know what he voiced in Rogue One and Solo. Maybe one day we’ll find out, or perhaps they will be the eternal easter eggs.