Charlize Theron and Will Smith sent gossip columnists into overdrive when they were spotted screaming at one another on Hollywood Boulevard during filming of new movie John Hancock. Bystanders had no idea the row was being filmed when Theron was heard yelling "It’s over" at her co-star. But movie insiders have calmed the fuss, insisting the quarrel was part of the film.

Source: ContactMusic.com

Currently shooting around Los Angeles, the big-budget film — which has also been known simply as "Hancock," but whose title is still up in the air — puts Smith alongside Charlize Theron and Jason Bateman in a dark story that explores the flipside of being a superhero. So if the Venom-suited scenes from "Spider-Man 3" or the peanut-flicking bar moment in "Superman III" were among your favorites, "John Hancock" has your name written all over it.

"Will plays a down-and-out superhero — a drunk, homeless superhero that the [public] doesn’t like because he’s so drunk that when he solves crime, he creates a lot of collateral damage," Bateman explained of the movie, which has been dangling Smith on wires 50 feet over L.A. streets. "Early in the film he saves my life, and I say to pay him back I’ll revamp his image for him because I’m in corporate PR. We’re well into that, and I’m buying him a cape and telling him how to do news conferences and all that crap — and then he falls for my wife, Charlize Theron."

"There’s a real intelligence to it," said Theron, who reportedly has some steamy scenes with Smith.

More on the film on MTV.com

Pics of Charlize Theron On the Set looking hot below