Ewan McGregor says Darth Vader "truly frightened" him while filming Obi-Wan Kenobi

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"I've never met Darth Vader," McGregor told Total Film. "I had rehearsed the scene with Vader, but not with the helmet on or anything like that. When we came to do the scene, when they shouted 'action,' he had to come from behind me. I turned around, and f*cking Darth Vader was coming at me. It was like I was six again."