Elizabeth Olsen and Mark Ruffalo preview 'The Avengers: Age of Ultron'

Fans have known for quite a while that Elizabeth Olsen would portray Scarlet Witch in The Avengers: Age of Ultron, but now the actress is really getting to sink her teeth into the part as filming has commenced.

"My character is incredible and absolutely out of her mind," Olsen told Cover Media (via Comic Book Movie). "[She's] incredibly passionate and thinks she's in control more than she actually is. She's stubborn and an epic woman who has not been created by a human yet. So it's really fun to be a part of that and try and honor fans."

The site asked about her workouts to prepare for the movie and if she had to wear an "unforgiving" outfit.

"I always like working out. I guess I grew up being an athlete. I am not obsessive with anything really, but I am a witch, so I get to use energy fields. But that's it. (laughs)"

Olsen and Aaron Taylor-Johnson, who plays Scarlet Witch's brother Quicksilver, spoke to Moviefone in a separate interview and Taylor-Johnson admitted the fast-paced shooting of the movie is a bit different.

"It's like, 'Wait, we shot the whole scene?' Because they put four cameras on us at once and it's quick, quick, quick...  It's like, 'I thought I maybe had a few other ways of doing that.' And they're like, 'Nope, done,'" he said.

Olsen also commented about how much fun she is having on set. "I'm laughing all the time," she said. "The crazy thing is that it's like, 'I'm throwing sh*t with my hands, that's cuckoo!' But it's also like, 'We're saving lives. And it's very serious.' There's always that reminder that it's very serious."

Finally, the site asked if their characters would be in full costume by the end of the movie as with most superhero films, and Olsen replied, "Well, we're not part of the team, so it's not the same thing..." Both she and Taylor-Johnson stayed silent when asked if they would become part of the Avengers.

Mark Ruffalo also spoke to Access Hollywood at the premiere of his new film in New York City and talked about his return as the Hulk, specifically with regard to the motion capture and putting the dots back on his face:

"We're in London right now, so I came in for this. It's been pretty wild. The technology is really advanced, so we can do a lot more with the Hulk performance in particular than we could last time around. So I'm really excited about the stuff we're doing right now with him and I feel like he's got some really nice nuance stuff; kind of his own little arc. The [Bruce] Banner stuff is great. Joss Whedon topped himself. It's such a great, beautifully written script and really exciting and fun."

What do you make of all this? Let us know in the comments below.