​Tom Hiddleston joins Instagram dressed as Loki - CNET

While Marvel fans have to wait until 2017 to see troublemaker villain-sometimes-superhero-ally Loki in action in "Thor: Ragnarok," actor Tom Hiddleston decided to give everyone a sneak peek of his character.

On August 9, Hiddleston joined Instagram and posted his first photo -- a selfie of himself dressed as Loki with the caption "He's back!"

The trickster character Loki hasn't appeared on the big screen since "Thor: The Dark World" in 2013, so seeing Hiddleston happy to be back in costume does our geeky hearts good.

Directed by Taika Waititi, "Thor: Ragnarok" stars Hiddleston, as well as Karl Urban, Chris Hemsworth, Idris Elba, Cate Blanchett, Mark Ruffalo, Jeff Goldblum, and Anthony Hopkins.

"Thor: Ragnarok" hits theaters in October 2017 in the UK and November 2017 in the US.