Joss Whedon & "Avengers" Cast Look At Quicksilver & Scarlet Witch In New "Age of Ultron" Featurette

In the latest release to build excitement for Marvel Studios' "Avengers: Age of Ultron," the studio shared a new behind-the-scenes featurette on two characters director Joss Whedon called "massively important": Quicksilver and Scarlet Witch.

Aside an exploration of the powers of the twins with actors Aaron Taylor-Johnson and Elizabeth Olsen, the clip contains some minor spoilers for the incoming film, including a tease of Scarlet Witch's connection to the established Avengers team and a look at their back story.

"Avengers: Age of Ultron" premieres on May 1.

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