Ooooh, this is gonna make Donald Trump so angry... which means it's a good thing!!
And boy, are they ever!!
Ever since Bryan Cranston famously fooled Breaking Bad fans at 2013's Comic-Con by disguising himself with a Walter White mask, other stars have followed suit to fool their fans at future conventions!
At New York Comic-Con on Sunday, it was an Avenger and a Suicide Squad member who joined in the fun!
Leto, who is playing the Joker in the upcoming Suicide Squad movie, had the most fun wearing a rather scary Rafiki mask from The Lion King!
The 43-year-old posed with one fan who was dressed up as the Joker — who had NO idea he was taking a picture with the actual joker! Leto shared on Twitter:
Ruffalo, who plays David Banner/the Hulk in Marvel's Avenger series, went incognito to the event with his three children! Donning a horrific mask, he shared a photo with his son Keen on his Instagram:
Had a great time at #comiccon2015 NYC! Thanks ComicCon for the Hospitality.A photo posted by Mark Ruffalo (@markruffalo) on Oct 10, 2015 at 3:18pm PDT
Note to Comic-Con attendees — be wary of any individual wearing a mask from this point on, it might just be a celeb in disguise! LOLz!