Guinness's role as Obi-Wan Kenobi in the original
Star Wars trilogy, beginning in 1977, brought him worldwide recognition by a new generation, as well as Golden Globe and Academy Award nominations.
In letters to his friends, Guinness described the film as "fairy tale rubbish", but the film's sense of moral good – and the studio's doubling of his initial salary offer – appealed to him, and he agreed to take the part of Kenobi on the condition that he would not have to do any publicity to promote the film.[19] 
He negotiated a deal for 2.25% of the gross royalties paid to the director,
George Lucas, who received one-fifth of the box office takings. This made him very wealthy in his later life. Upon his first viewing of the film, Guinness wrote in his diary, "It's a pretty staggering film as spectacle and technically brilliant. Exciting, very noisy and warm-hearted. The battle scenes at the end go on for five minutes too long, I feel, and some of the dialogue is excruciating and much of it is lost in noise, but it remains a vivid experience."
[20]
However, Guinness soon became unhappy with being identified with the part, and expressed dismay at the fan following that the Star Wars Trilogy attracted. In the DVD commentary of the original
Star Wars, Lucas says that Guinness was not happy with the script rewrite in which Obi-Wan is killed. However,
Guinness said in a 1999 interview that it was actually his idea to kill off Obi-Wan, persuading Lucas that it would make him a stronger character, and that Lucas agreed to the idea. Guinness stated in the interview, "What I didn't tell Lucas was that I just couldn't go on speaking those bloody awful, banal lines. I'd had enough of the mumbo jumbo." 
He went on to say that he "shrivelled up" every time
Star Wars was mentioned to him.
[21]
In the final volume of the book
A Positively Final Appearance (1997),
Guinness recounts grudgingly giving an autograph to a young fan who claimed to have watched Star Wars over 100 times, on the condition that the boy promise to stop watching the film, because, as Guinness told him, "this is going to be an ill effect on your life." The fan was stunned at first, but later thanked him (though some sources say it went differently). Guinness is quoted as saying: "'Well,' I said, 'do you think you could promise never to see Star Wars again?' He burst into tears. His mother drew herself up to an immense height. 'What a dreadful thing to say to a child!' she barked, and dragged the poor kid away. Maybe she was right but I just hope the lad, now in his thirties, is not living in a fantasy world of secondhand, childish banalities."
[23] Guinness grew so tired of modern audiences apparently knowing him only for his role of Obi-Wan Kenobi that he would throw away the mail he received from
Star Warsfans without reading it.
[24]