The Avengers are assembling ... and they've got some new friends!

Filming is currently underway for the highly-anticipated sequel "Avengers: Age of Ultron" in Asota, Italy, and today we got our very first look at some brand new characters joining everyone's favorite superheroes.

Elizabeth Olsen and Aaron Taylor-Johnson were spotted on set with returning star Jeremy Renner, who showed off his impressive biceps while dressed in his Hawkeye costume.

While we have seen concept art of Olsen's Scarlet Witch and Taylor-Johnson's Quicksilver, this is the first time we've seen them in the flesh ... and, we gotta say, they look pretty badass!

Dressed in a red leather jacket, black leather cuffs and a black dress, tights and boots, Olsen looked decidedly more goth than the usually bubbly blonde normally does in public.

And she wasn't the only one majorly changing her appearance for the flick.

Taylor-Johnson traded his normally dark hair for long, white locks with dark roots. He was also sporting a goatee and appeared to be wearing eyeliner.

Olsen's character is a powerful sorceress capable of casting spells and manipulating energy, while Taylor-Johnson will play her brother ... a superhuman who can move at incredible speeds.

Quicksilver will also appear in the upcoming "X-Men: Days of Future Past," where he'll be played by Evan Peters. We definitely think Aaron got the better costume!

Check out the gallery above to see more photos from the set, including what could be our first look at the title villain!

"Avengers: Age of Ultron" is set to hit theaters May 1, 2015.

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