WATCH: Tom Hiddleston Surprises 'Avengers' Fans Dressed as Loki

That famous Hiddle-charm was on display when Tom Hiddleston surprised five Loki cosplayers at a recent Avengers fan event in London.

Like similar events held in Seoul, Singapore and Tokyo, Japan, many fans were dressed up as their favorite member of the Avengers team, as they got a sneak 20-minute preview of the hotly-anticipated Avengers: Infinity War.

Tom was there alongside his co-stars Benedict Cumberbatch, Tom Holland, Elizabeth Olsen, Sebastian Stan, Paul Bettany, and Letitia Wright, who assembled on stage not for Infinity War but for a group selfie.

Don't believe us? Then watch this. Avengers, assemble!

Incredibly, that's still only a fraction of the movie's gigantic cast, which also includes Robert Downey Jr., Chris Evans, Mark Ruffalo, Scarlett Johansson, Chris Hemsworth, Anthony Mackie, Jeremy Renner, Chadwick Boseman, Don Cheadle, Chris Pratt, Dave Bautista, Zoe Saldana, Pom Klementieff, Benedict Wong, Sean Gunn, Paul Rudd, and Josh Brolin.

That was as close as fans got to the stars of the film — except a lucky few. Five audience members in perfect Loki cosplay were picked to do their best impression of the character on camera, not knowing that Loki himself — a.k.a. the Hiddlinator — was watching from behind a curtain.

Marvel yesterday (April 17) released the video of what happened when they found out. Let's just say their reactions are priceless:

Avengers: Infinity War will finally open in theaters next Friday, April 27, 2018.

Are you excited to see what happens to Loki?