Jon Favreau Talks 'Iron Man 2’ & Twitter On 'Late Night With Jimmy Fallon'

Jon Favreau talks Iron Man 2"Iron Man 2" director Jon Favreau appeared via Skype on "Late Night with Jimmy Fallon" last night, giving the rookie host a boost over a certain other talk show hand-off earlier in the evening. When Fallon asked Favreau for some details about the "Iron Man" sequel, the director made it clear that he couldn't spill the beans -- and that his Twittering habit has already caused him enough grief from Marvel.

"It's a very secret production, as you understand, and I sometimes get in trouble for revealing too much information," Favreau told the host. "I was on Twitter and I talked about Scarlett Johansson and her Black Widow suit, and I got in trouble with Marvel. So Marvel is actually here watching me, and I'm getting the 'no, I can't comment on that.'"

Indeed, we've received plenty of "Iron Man 2" reports over the past several months, with Favreau's own Twitter account providing an unlikely wealth of information. Apparently, we weren't the only ones who noticed the filmmaker's online presence -- perhaps the days of scoop via Twitter are finally over.

The question that Fallon had in mind pertained to Favreau's on-screen whereabouts -- the director was actually enjoying the first day of shooting on the set of Hammer Industries, the corporation controlled by Tony Stark's rival, Justin Hammer. Hammer, of course, is played by Sam Rockwell in the film.

Fallon went on to ask about some of the new cast members, including the aforementioned Johansson and Mickey Rourke, but Favreau nervously made it clear that he couldn't give away any secrets. The director's comedy roots were on full display as he jokingly looked off camera for approval from the Marvel watch dogs. Clearly, they weren't having any of it.

Moments later, Favreau offhandedly scratched his nose -- while wearing Iron Man's trademark red gauntlet, complete with repulsor ray light up.

"I was doing some insert work," the director justified. "I'm Robert Downey's stunt hand."

Do you think we've seen the last of Jon Favreau's Twitter scoops, or will that Iron Man gauntlet replica come in handy against the Marvel studio heads?