Hamill enjoys a lighthearted moment with Alec Guinness on the set of Star Wars.
Hamill found fame with the hero role of Luke Skywalker in Star Wars in 1977. He was originally cast as David on "Eight Is Enough," and asked to be released from his contract before Star Wars came out because he sensed the movie would be successful. Hamill wanted to focus on his movie career. At last his producers agreed to remove him from the series.
In January 11, 1977, a day before he was set to shoot one of the final scenes needed for the film, Hamill was involved in a car accident that caused minor damage to his face. A double was used for the scene of Luke racing across the desert in his landspeeder while Mark was hospitalized. In an A&E Network Biography special, "Mark Hamill: A Force to Be Reckoned With," the auto accident and its consequences are recounted by Mark's family.
As a result of this scarring, Hamill wore an extensive amount of facial makeup when he reprised his role as Luke for The Star Wars Holiday Special, which was released in 1978. A common myth is that the slight damage to Mark's face was explained in-universe in The Empire Strikes Back by the scene where he is mauled by a Wampa. His son Nathan was born while he was shooting Episode V. Before the film's climactic lightsaber duel between Luke Skywalker and Darth Vader, Lucas told Hamill the truth about Vader being Luke's father.
Hamill poses for a picture when presented his star on the Walk of Fame in Hollywood in 2018
George Lucas once considered doing a sequel trilogy in which Hamill would reprise the role of an older and wiser Luke Skywalker as an Obi-Wan-like Jedi Master in his sixties training a new era of Jedi Knights, including the protagonist of the sequels set against the backdrop of the rebuilding of the Republic and the dismantlement of the last remnants of the Empire. It would be filmed around 2011. Lucas long dismissed this as an off-hand comment, but then on October 30, 2012, the talk of a possible sequel, to be released in 2015, was back in the news when Lucasfilm was sold to Disney. After production officially started on The Force Awakens, rumors spread that Disney would hire Hamill and the other stars of the original trilogy to reprise their roles. The rumors were eventually confirmed in 2014 with the first major casting announcement, which confirmed that Mark Hamill would play Luke Skywalker once again. Hamill received a star on the Walk of Fame in Hollywood in 2018.
In 2021, Hamill responded on Twitter to a tweet by the official Wookieepedia account about his voice cameo as EV-9D9 in The Mandalorian episode "Chapter 5: The Gunslinger." Hamill said that he had provided voice cameos for every Star Wars film released since 2015. Although he had tweeted about this previously and shared his pseudonym, "William M. Patrick" for his older and younger brothers, his response to Wookieepedia was picked up by media outlets such as People and IGN.
Mark Hamill appeared as Luke Skywalker in a few shows, including The Bob Hope All Star Christmas Comedy Special, The Muppet Show, Family Guy, Robot Chicken, and The Late Show With Stephen Colbert.
He quoted Star Wars at least twice in his comic book roles: as Joker, he said "May the floss be with you"; and as Trickster, he said "I am your father," as a role-reversal line from The Empire Strikes Back.
Hamill played the villain "Cocknocker" in the 2001 Kevin Smith film Jay and Silent Bob Strike Back; The film makes multiple references to Star Wars, including a lightsaber-esque battle between Hamill's character and the title characters.
Hamill voiced co-star Harrison Ford (as Han Solo) in 2017 for the spoof video The Force Awakens: A Bad Lip Reading.