Almost 41 years ago, 24-year-old Mark Hamill arrived in Tunisia for quite possibly his most ambitious role to date -- that of a farmboy-turned-hero in a sci-fi/fantasy film. The role was Luke Skywalker, and the film was "Star Wars," the first installment in a franchise that would reshape the world and define Hamill's career. The actor, who reprised the role in 2015's "Star Wars: The Force Awakens," reminisced about his first day on set with a new post on Twitter. RELATED: JJ Abrams Says Mark Hamill Should Win An Oscar For The Last JediAs Hamill points out in the tweet, the shot comes from his very first day on the "Star Wars" set and was taken before his first scene was filmed. That scene was the infamous droid auction, wherein Luke and his Uncle Owen come to possess C-3PO and R2-D2. Also, Hamill points out that this is most likely the very first picture of himself on set in Luke's costume.

Hamill of course went on to play Skywalker in the sequels, 1980's "The Empire Strikes Back" and 1983's "Return of the Jedi." Hamill returned in "The Force Awakens," appearing in the final scene of the highly anticipated film. Luke's journey will continue this year with the release of "Star Wars: The Last Jedi."

The second film in the new “Star Wars” trilogy, “The Last Jedi” is written and directed by Rian Johnson (“Brick,” “Looper”). Opening Dec. 15, the film stars returning actors Mark Hamill, Carrie Fisher, Adam Driver, Daisy Ridley, John Boyega, Oscar Isaac, Lupita Nyong’o, Domhnall Gleeson, Anthony Daniels, Gwendoline Christie and Andy Serkis.