Ewan McGregor has admitted he was left terrified when he filmed scenes with ‘Star Wars’ villain Darth Vader for the first time. The Scottish actor has reprised his role as Jedi Master Obi-Wan Kenobi in the new Disney+ show of the same name, and he finally got the chance to do battle with the evil Sith Lord, but has admitted the experience was “frightening”. During an appearance on ‘The Tonight Show Starring Jimmy Fallon’, Ewan explained: “It was frightening to see him again though. I hadn’t acted with Darth Vader. “And I’ve been acting a long time. I think I’ve done a lot of stuff. But the fir…