Hollywood is finally noticing Justin Theroux for something other than his soulful eyes and killer cheek bones. Sources tell that the celebrated character actor (Mulholland Drive, Six Feet Under) has just landed the sweetest writing gig in town: He’s taking on the script for Iron Man 2. Marvel Studios won’t confirm the deal, but Theroux has generated a lot of interest after early screenings of Tropic Thunder, the Ben Stiller, Jack Black, Robert Downey Jr. comedy (out Aug. 13) he co-wrote with Etan Cohen and Stiller. Theroux made his directorial debut with last year’s Billy Crudup/Mandy Moore dramedy Dedication and will now get first crack at writing the sequel to this summer’s highest-grossing film so far.