Obi-Wan Kenobi is a fictional character in the Star Wars franchise. Within the original trilogy, Obi-Wan is a Jedi Master as a supporting character and is portrayed by English actor Alec Guinness. In the later-released prequel trilogy, a younger version of the character serves as one of the two main protagonists, alongside Anakin Skywalker, and is portrayed by Scottish actor Ewan McGregor. In the original trilogy he is introduced as Ben Kenobi, an alias he uses while in hiding from the Empire. He is a mentor to Luke Skywalker, to whom he introduces the ways of the Jedi. After sacrificing himself in a duel against Darth Vader, Obi-Wan guides Luke through the Force in his fight against the Galactic Empire. In the prequel trilogy, set two decades earlier, he is initially a Padawan (apprentice) to Jedi Master Qui-Gon Jinn, and later mentor and friend of Luke's father Anakin, who falls to the dark side of the Force and becomes Vader. The character briefly appears in the sequel trilogy as a disembodied voice, speaking to protagonist Rey, and serving as the namesake of Ben Solo. He is frequently featured as a main character in various other Star Wars media, including the streaming television miniseries Obi-Wan Kenobi, in which McGregor reprised the role.

Star Wars is an American epic space opera media franchise created by George Lucas, which began with the eponymous 1977 film and quickly became a worldwide pop culture phenomenon. The franchise has been expanded into various films and other media, including television series, video games, novels, comic books, theme park attractions, and themed areas, comprising an all-encompassing fictional universe. Star Wars is one of the highest-grossing media franchises of all time.