Watch James Spader Play Ultron in His Mo-Cap Suit in AVENGERS: AGE OF ULTRON
James Spader gave a mesmerizing performance in Joss Whedon's Avengers: Age of Ultron. Yeah, I know that the character he played was completely CG, but you could definitely see his mannerisms in the character. Turns out he was so good while shooting the film that his co-stars had trouble concentrating on what they were supposed to be doing because they just wanted to watch Spader do his thing.
A behind the scene video has been released for the film that offers us some footage of Spader dressed up in his motion-capture suit as he performs. It also features interviews with the cast and crew talking about what it was like working with Spader. It also touches on bringing Scarlett Witch into the story.
Source: USA Today