While comic books and novels delved deeper into Luke's journey, that wasn't reflected in Star Wars films like The Force Awakens or The Last Jedi.
Hamill's response led fans to wonder if some of these untold storylines would find their way into Star Wars: Episode IX.
According to Comic Book, if Hamill was familiar with "Legends," he'd know that Luke Skywalker married "a seemingly reformed believer in the Galactic Empire, Mara Jade." Mara Jade and Luke Skywalker even had a son, Ben Skywalker.
While discussing his role and performance in The Last Jedi to Entertainment Weekly, Hamill said he created a fictional backstory for Luke to motivate him to get in the right headspace.
Although Hamill admitted his scenario is very unofficial, fans are hopeful more information (or at least flashbacks) about Luke's journey will be revealed in Episode IX, as Hamill is confirmed as a returning character.
We can't wait to see how Luke Skywalker is incorporated into Episode IX, set to hit theaters next Dec.