Mark Ruffalo Tweets 'Avengers: Age Of Ultron' Updates

Tuesday, Robert Downey Jr. revealed via Twitter Tony Stark/Iron Man had finally arrived on the set of Avengers: Age of Ultron. Today, his co-star Mark Ruffalo did the same. The difference being Bruce Banner/Hulk revealed the entire team has once again reassembled; he also posted a few images from the set. Nothing particularly revealing, but they're pretty cool nevertheless. Check out Ruffalo's Avengers: Age of Ultron updates below.

Update: There's a new shot from Robert Downey, Jr., too.

Thanks to @MarkRuffalo on Twitter for these tweets.

And Robert Downey Jr. chimed in with:

In another tweet, Ruffalo also revealed the production, which had previously been in Africa and South Korea, has finally made it to the United Kingdom.

It's interesting how Ruffalo and Downey Jr. are being more active on set than the film's director, Joss Whedon. The film's mastermind continues to tweet, but hasn't mentioned the film once.

Hulk is going to have an expanded role in this film, after being the highlight of the original but also largely absent from Phase 2. (He did, of course, show up as Tony Stark's "therapist" in Iron Man 3.) From the previously revealed Avengers: Age of Ultron concept art (below), we've seen he'll somehow square off with Stark in his Hulkbuster outfit and also go back to back with Black Widow. The question, however, is this: is Hulk just training with Stark, or has he become a real problem for The Avengers? You'd almost assume the latter, simply because that would give the character a larger, more complex role in the film. Otherwise, how has Whedon figured out to expand Banner's role? Maybe something surrounding the A.I. powering Ultron? We'll have to wait just about a year to find out. Here are those concept images, by the way.

Avengers: Age of Ultron opens on May 1, 2015. Which is 53 long, excruciating weeks away. It stars Robert Downey, Jr., Chris Hemsworth, Mark Ruffalo, Chris Evans, Scarlett Johansson, Jeremy Renner, Samuel L. Jackson, Aaron Taylor-Johnson, Elizabeth Olsen, and James Spader.