Actress Elizabeth Olsen has confirmed reports she has joined the cast of The Avengers sequel Age of Ultron. Samuel L. Jackson let it slip that the Martha Marcy May Marlene star had landed the role of Scarlet Witch in the film last month (Oct13), and now she is speaking out about joining the superhero film franchise. She'll team up with Aaron Taylor-Johnson - her co-star in upcoming monster movie Godzilla - who will play her twin brother Quicksilver in The Avengers movie. She says, "We get to play husband and wife (in Godzilla), and we get to play twin brother and sister. It's also fun because even though in Godzilla we play husband and wife, we don't have a lot of scenes together. I just love him. I love his family. I love his kids. I'm so excited... I think it's going to be fun." Olsen also can't wait to start working with director Joss Whedon, adding, "He's very smart. He's too smart. He might be too smart. Some people are too smart for their own good, but he's amazing."