Callan Mulvey might be taking on the role of The Joker in the upcoming "Batman v. Superman: Dawn of Justice" film.

A TMZ employee spotted Mulvey and asked the actor about director Zack Snyder's production. Mulvey declined to comment as he most likely signed a confidentiality agreement to keep quiet about the production.

TMZ released a conspiracy theory video where the team speculated about Mulvey's role. Based on Mulvey's menacing looks and being an Australian native like the late Heath Ledger, he is the likely actor to take on the role of The Joker.

However, the "Batman vs. Superman" production has not confirmed the appearance of The Joker in the franchise, despite cinematographer Larry Fong posting an image of a face down playing card on what is rumored to be the official production set.

You can watch TMZ's theory about Mulvey taking on the role of The Joker in the video below.

In other "Batman vs. Superman" news, filmmaker Kevin Smith recently dished about his theories about the production during a "Hollywood Babble-On" podcast. Smith is convinced Snyder and Warner Bros. are setting up the DC Universe in order to introduce the "Justice League" film franchise.

"But look, they're obviously beginning something, and there's a stretch of these flick, and so this is the beginning of the Justice League, as we all suspected as they were announcing that cast," Smith said during the podcast. "We were like, 'This is the beginning of a Justice League movie.' From what I understand now, it's no longer like, 'This is Superman 2.'"

"They're not doing these things," he added. "They're doing like, 'Here's Man of Steel. Here's Batman/Superman: Dawn of Justice.' The next one is not like a sequel to one of the characters. They're just going to keep building their universe for about five or six movies. But all of's supposed to tell one massive story, which is all Justice League ord."

"Batman v. Superman: Dawn of Justice" will be released to theaters on May 6, 2016.