UPDATED: Rumor control--Is Iron Man 2's Downey a real hero? What's Stan Lee's cameo?

[Updated: Paramount confirmed that the story about Iron Man 2 star Robert Downey Jr. is absolutely not true.]

The Web rumor mill centers on Iron Man 2 today, with reports of star Robert Downey Jr.'s reported real-life heroism and comic legend Stan Lee's rumored cameo role. (Spoilers ahead!)

First, the Irish IOL Entertainment site reports that Downey rescued an injured extra during the shooting of a scene:

The 44-year-old actor halted shooting on Iron Man 2 and rushed to help the man, who had been injured during a scene. A source said: "Robert charged into a live scene yelling, Cut! Cut! The extra was writhing on the ground in agony after a rampaging evil robot smashed him flat". The extra had been involved in a sequence which saw a group of people running away from a group of robotic villains. ... Robert called for paramedics and comforted the man until they arrived. The injured extra was taken to hospital, where he was diagnosed with a broken hip.

Now we're big fans of Downey and believe this is just the kind of thing he would do, but given our experience with U.K. Web sites reporting all kinds of outlandish things, not to mention its dubious anonymous "sourcing," we kind of knew this was bogus.

In the meantime, our pals at Collider.com report a rumor about the cameo casting of Marvel Comics legend Stan Lee. Fans know he's had a walk-on in virtually all Marvel-themed movies. Here's what an anonymous source told Collider:

"Since I hadn't read this news anywhere, I wanted to let you know Stan Lee filmed his cameo for Iron Man 2. I was told Stan filmed earlier this week, and he was dressed as Larry King. The scene has Stan asking Tony Stark when he's going to be on his show."

Iron Man 2 is still in production with an eye to a May 7, 2010, release.

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