'Thor: Ragnarok' Set: Mark Ruffalo Hulks Up for Chris Hemsworth Sequel on Twitter

Filming for Thor: Ragnarok has already begun in Australia, and the Asgardians Chris Hemsworth and Tom Hiddleston are back for some more space goodness, accompanied this time around by Oscar nominee Mark Ruffalo, reprising his beloved role as The Incredible Hulk -- and the actor's Twitter shows he's already having a blast on set!

Last Tuesday, the actor took to the social network (where he's pretty active altogether) to share a short clip taken on the Ragnarok set. On it, he's wearing some giant and very green Hulk fists, practicing some punches into the camera, as he's set to reprise his superhero role for the first time since last year's Avengers: Age of Ultron.

Hello from the set of #Thor3! As you can see, I've got my hands full. It ain't easy being green....@thorofficialhttps://t.co/PnYTnX8n96

— Mark Ruffalo (@MarkRuffalo) July 12, 2016

In the days since the film's production began, Ruffalo has been pretty active on Twitter, giving fans a bit of a sneak peek on the making of the third Thor movie -- including showing off his "legendary, man-canceling suit," which he talked about last year on Jimmy Kimmel Live! In the first Avengers movie, Thor and Hulk's relationship was shown as playfully competitive, and they had a few hilarious run-ins. We're going to have to wait and see how they're managing with each other these days, all over the universe and without the rest of the team to assemble around them.

Little is known so far about Thor: Ragnarok, but one thing seems clear: it will mark the point where the Infinity War will begin in the Marvel Cinematic Universe. A few months back, Ruffalo described it as "a universal road movie," so we could expect something like Easy Rider or even Thelma & Louise. The cast for the film is quite impressive.

Besides Marvel vets like Hemsworth, Hiddleston, Ruffalo, Anthony Hopkins and Idris Elba, the film will be adding a few new characters, including Karl Urban as Skurge, Tessa Thompson as superhero Valkyrie, Jeff Goldblum as The Grandmaster and two-time Oscar winner Cate Blanchett in the role of the main villain, Hela, the first major female super-baddie in the MCU.

A few Thor regulars like Jaimie Alexander, Natalie Portman, Stellan Skarsgard and Kat Dennings are apparently not joining the film, though considering how secretive Marvel can be, they could be pulling our leg on this one.

Thor: Ragnarok will hit theaters on November 3, 2017.