Also known as Scarlet Witch and Quicksilver, they're two of the new additions to the Marvel Cinematic Universe in the Avengers sequel.
Unlike their comic book counterparts, the MCU versions aren't the progeny of Magneto, nor are they mutants. Since Fox owns the movie rights to all things mutant, these two are instead Inhumans, products of ancient Kree experiments living among us on Earth. With mutation off-limits, Marvel is making the Inhumans the MCU equivalent to Fox's evolved superfolks.
Their allegiance might just change by the time the credits roll, but Wanda and Pietro start Avengers: Age of Ultron as antagonists for Earth's Mightiest Heroes. And what formidable foes they make! Especially Scarlet Witch, who isn't just telekinectic, she's also capable of magically manipulating the human mind, drawing out anyone's worst fears and using them against even the most super superheroes. Quicksilver, meanwhile, is really, really fast.
Elizabeth Olsen and Aaron Taylor-Johnson, who were husband and wife in last summer's Godzilla, play the Maximoff siblings. Both discuss their characters in this new featurette, which finds Joss Whedon and Chris Evans also chiming in on the duo.
"They have an origin but it’s largely described. They’re already good to go by the time we’re up and running," Whedon recently explained of the Super Siblings. "You don’t want to fall into Spider-Man 3 territory – and I say that as a guy who actually thinks pretty well of that movie, there’s some great stuff in that movie – but there comes a point where you’re overloaded with frontstory, backstory, origin story and it becomes very hard to juggle. My instinct is always, ‘Don’t put in more, work with what you have.’"
These two misguided youngsters fall under the sway of the villainous Ultron, an artificial intelligence created as an ally of the Avengers who surprises his creator, Tony Stark, by instead seeking to wipe out humanity, starting with our heroes.
James Spader plays Ultron via motion capture. Andy Serkis shows up as another bad guy, Ulysses Klaw. Another (sort of) newcomer is Paul Bettany, who has voiced Tony's digi-sidekick in three Iron Man movies and the first Avengers, makes his onscreen debut in the sequel as Vision.
Robert Downey Jr. returns as Tony Stark, obviously, along with Chris Evans as Captain America, Scarlett Johansson as Black Widow, Mark Ruffalo as Hulk, Chris Hemsworth as Thor, Jeremy Renner as Hawkeye, Samuel L. Jackson as Nick Fury, and Cobie Smulders as Maria Hill.
Avengers: Age of Ultron opens in 2D and 3D this May 1st.