Chloe Moretz, star of Kick-Assand Let Me In, is in New York City this week filming an episode of NBC’s 30 Rock. We know this because she tweeted it. And because the network confirms it. The show’s rep, however, won’t reveal what part 13-year-old Moretz is playing. Care to guess, PopWatchers? I’m thinking maybe Liz gets some kind of Sliding Doorsepisode, and we find out what her life would have been like if she hadn’t been head writer at TGS — and Moretz plays her smart-mouthed daughter. Or, maybe it’s time for a Pete-centric episode – and she plays his smart-mouthed daughter. Or, maybe all this recent talk about how "no child should have Jenna Maroney for a mother,"which is why the exec producers aren’t planning on writing Jane Krakowski’s real-life pregnancy into the show, got them to thinking that Jenna should have a secret daughter that finds her and proves that point in 22 minutes (or a pregnancy scare and imagine what her life would be like as a mother) — and Moretz plays her smart-mouthed make-believe daughter. Or maybe Jack has a near-death experience rushing to get to Avery when she’s in labor, and he imagines what he would miss if he were to die and not see his smart-mouthed daughter — played by Chloe Moretz — grow up.