"Avengers" director Joss Whedon has been very open about his intentions to include brother-sister duo Scarlet and Quicksilver in his upcoming sequel "Age of Ultron," but confirming who will play the sibling has been a little more difficult to pin down.

"Kick-Ass" star Aaron Taylor-Johnson was first mentioned as a contender for the role of Quicksilver this summer and was finally confirmed for the part last month (via The Wrap). He was said to be joined by his "Godzilla" co-star Elizabeth Olsen, in a report from Bleeding Cool in August, but an official confirmation was harder to come by for Scarlet Witch.

Samuel L. Jackson's comments to The Wall Street Journal seemed to have confirmed that Olsen would appear with him in "Avengers: Age of Ultron," but now the actress herself has shared her excited about joining the project with MTV News' Josh Horowitz.

Speaking with MTV News at the junket for "Oldboy," Olsen joked that Jackson had freed her from refusing to talk about the project by confirming her role. She said that she doesn't know too much about "Avengers: Age of Ultron," but that she's excited to work with Taylor-Johnson again.

"We get to play husband and wife, and we get to play twin brother and sister," she said. "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...to actually work with each other. I think it's going to be fun."

Olsen also mentioned her soon-to-be director, Whedon, who she was quick to compliment. "He's very smart. He's too smart. He might be too smart," she said. "Some people are too smart for their own good, but he's amazing."

"Avengers: Age of Ultron" opens in theaters on May 1, 2015.