Obi-Wan Kenobi, also known as Ben Kenobi, is a character in the Star Wars franchise. Within the original trilogy he serves as a supporting character and is portrayed by English actor Alec Guinness, while in the prequel trilogy a younger version of the character serves as one of the main protagonists and is portrayed by Scottish actor Ewan McGregor. In the original trilogy, he is a mentor to Luke Skywalker, to whom he introduces the ways of the Jedi. In the prequel trilogy, set decades earlier, he is a mentor and friend to Luke’s father Anakin, who eventually falls to the dark side of the Force and becomes Darth Vader. He is frequently featured as a main character in various other Star Wars media.