The 43-year-old, who starred in the trio of 'Star Wars' prequels, spoke out when he was asked if he has positive experiences with fans of the sci-fi films.
“I don’t have any experience with them. I’ve never been to one of the conventions," he told Details magazine.
"The people I meet are the f***ers who want me to sign Star Wars photos so they can sell them on the Internet or the people at premieres who are crushing children against barriers to get me to sign their f***ing picture of Obi-Wan Kenobi.
"They’re not fans - they’re parasitical lowlifes and f***ing w**kers.”
Ewan starred in the three 'Star Wars prequels
The Scottish star also admitted he has only watched 'The Phantom Menace' once so wasn't in a position to comment on the criticism that it is the worst film in the 'Star Wars' series.
“I watched it once, at the premiere, so I’m not in a good position to judge," he said. "They had a tall order, the three films I did.
"The fans waited so long and wanted to feel like they did when they watched the first film, but they were grown-ups by that time.
"I don’t mind the criticism. I’ve heard it to my face.”