Jon Favreau has offered up a tiny bit of news from the set of Iron Man 2, at least to his followers on Twitter. According to the director, rehearsals began on March 17, 2009, and he is already feeling overwhelmed by the film.

Here's what Favreau had to say on the subject:

@jon_favreau Rehearsals began today on Iron Man 2. Three weeks from shooting and my life is no longer my own. I forgot how overwhelming this process is.

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Iron Man 2, directed by Jon Favreau, will continue the tale of Tony Stark and his armored alter-ego as he continues his transformation from billionaire industrialist to super-hero. Robert Downey, Jr. will star as Tony Stark, with Paltrow returning in the role of his assistant Pepper Potts. Don Cheadle, Mickey Rourke, Sam Rockwell, Scarlett Johansson and Samuel L. Jackson also star. Iron Man 2 blasts into theatres May 7, 2010.