Let’s address the Skywalker in the room first. Mark Hamill is best known for playing the legendary hero Luke Skywalker in the original “Star Wars” trilogy. It wasn’t his first acting role, as he’d also appeared on a number of TV shows before George Lucas cast him as the young Jedi in 1977 (via IMDb). He joined the galaxy far, far away at just 25 years old, and you can now see some of his original audition on YouTube. The young star held his own against the likes of Alec Guinness, Harrison Ford, and Carrie Fisher, later becoming an icon in his own right.
He later returned to the role for the sequel trilogy as an aging Luke who exiles himself to the planet of Ach-To after the destruction of his new Jedi Temple at the hands of a young Kylo Ren (Adam Driver). He’s bitter and devoid of hope before meeting Rey (Daisy Ridley), who pulls him back into the eternal battle between good and evil. Luke sacrifices himself in the finale of “The Last Jedi” by distracting Kylo long enough for the Rebels to escape, revealing that his former student is fighting a Force Projection the entire time.
Many “Star Wars” fans weren’t impressed by Rian Johnson’s choice to kill Luke off in “The Last Jedi,” although he makes a brief return in “The Rise of Skywalker,” naturally. He even briefly reprises his role as a young, de-aged version of Luke in “The Mandalorian” Season 2 finale, saving Din Djarin (Pedro Pascal) and his gang from Moff Gideon’s (Giancarlo Esposito) Dark Troopers.