Mark Ruffalo and Jared Leto attended New York Comic Con, but fans did not even know they were there! The two actors walked the floor at New York Comic Con this past weekend in disguises and took pictures with unsuspecting fans.

Ruffalo and Leto both documented their day and activities at the east coast comic convention. Leto even took a picture with someone dressed up as his Joker character from the upcoming DC comic film "Suicide Squad."

"He had not idea," the actor captioned the photo on Twitter. Leto also posted some of the pictures he took on his Snapchat, according to Entertainment Weekly. Ruffalo also posted a number of pictures to the social media site Instagram of him at comic con wearing a mask.

This was not the first time an actor disguised themself in order to go on the comic con floor. "Breaking Bad" actor Bryan Cranston famously walked around San Diego Comic Con in a creepy mask of his character Walter White.

Leto is star of the upcoming "Suicide Squad" and is taking over the role of the Joker from the late Heath Ledger who played the DC villain in Christopher Nolan's "Dark Knight" trilogy. Ruffalo plays Bruce Banner, otherwise known as the Hulk in Marvels "Avengers" series.

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

#NYCC they had no idea :) A photo posted by JARED LETO (@jaredleto) on Oct 11, 2015 at 2:28pm PDT

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