30 Rock isn’t only a critically beloved TV show; it’s guest-star-beloved, too. People are fans now, so they’re asking to be on, star Jane Krakowski said at a party for Intermix on September 6. Megan Mullally’s on, Jennifer Aniston’s on, Steve Martin’s coming on. There are also rumors that Oprah Winfrey and even the Gossip Girl kids might visit, too. Gossip Girl and 30 Rock both shoot at Silvercup Studios. I finally got to meet Blake and Penn, Krakowski said. Does that mean they’ll be on 30 Rock? I don’t know if it’s official, she said. I just said hello to them over coffee.