There's a long tradition of celebrities donning disguises so they can stroll the floor of Comic-Con International in San Diego without being mobbed for photos and autographs. Some, like former "Mythbusters" host Adam Savage, go all out (this year, he dressed as the bear from "The Revenant," complete with Leonardo DiCaprio dummy). Others, like Henry Cavill, take a less-elaborate approach.

The star of "Batman v Superman' and the upcoming "Justice League" donned a simple Guy Fawkes mask from "V for Vendetta" to escape the attention of fans.

Clad in a "Suicide Squad" T-shirt, Cavill browsed comics and posed for photos with attendees wearing Superman tees -- and, in one case, a Batman mask. Best of all, he managed to surprise Will Smith during a "Suicide Squad" signing. Check out the video below.

"Suicide Squad" opens Aug. 5. "Justice League" arrives Nov. 17, 2017..

A video posted by Henry Cavill (@henrycavill) on