Back in August it was rumoured that Marvel Studios wanted Elizabeth Olsen (Martha Marcy May Marlene) for the role of Wanda Maximoff – a.k.a. Scarlet Witch – in Joss Whedon’s hotly-anticipated sequel The Avengers: Age of Ultron, and now it looks like Olsen has become the second new addition to the cast after James Spader (The Blacklist), with Samuel L. Jackson seemingly confirming her involvement during an interview with The Wall Street Journal.

“I don’t think we begin shooting before March of next year. I know we’re shooting in London, that James Spader is Ultron and going to be the bad guy, and that we added Ms. [Elizabeth] Olsen [who will play the Scarlet Witch], but I don’t know what she’s doing, if she’s on the inside or the outside. I haven’t seen a script.”

Meanwhile, Jackson also went on to briefly dicuss his cameo in the second episode of Marvel’s Agents of S.H.I.E.L.D. [read our review here]: “I’m still playing the same guy, it’s the same process. I just show up and they turn the cameras on and we do it.”

The Avengers: Age of Ultron is set for release on May 1st 2015, with Olsen and Spader set to be joined by returning stars Robert Downey Jr., Chris Evans, Chris Hemsworth, Mark Ruffalo, Scarlett Johansson and Jeremy Renner. Meanwhile Oslen’s Godzilla co-star Aaron Taylor-Johnson (Kick-Ass 2) is thought to top Marvel’s list for the role of Scarlet Witch’s brother Quicksilver.