April 23rd, 2014
06:00 PM ET
We love Twitter-happy celebs.
Why? Because once they get to work on a new movie, we often get a glimpse behind the scenes.
On Tuesday, Rebel Wilson showed proof that "Pitch Perfect 2" is underway, with herself, Elizabeth Banks, Brittany Snow, Ester Dean and more returning. It's basically like the best reunion photo you've seen today, although we're sad that Anna Kendrick and Anna Camp weren't there for the fun photo-op.
And that's just one highly anticipated sequel that's getting underway. "The Avengers: Age of Ultron" has also rounded up its stars - from Robert Downey Jr. and Chris Evans to Jeremy Renner and Scarlett Johansson - to get to work on Joss Whedon's follow-up.
Apparently some of Ruffalo's favorite hanging buddies on set include Johansson and Downey. While he got a bromantic photo with the latter, he could only catch the black widow in passing in these photos from the "Avengers" set.
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