Writer, director, and actress Julie Delpy's new film, 2 Days in New York, a sequel to 2007's 2 Days in Paris, is a frenetic one; it buzzes with all the energy of the city, and then some. On the red carpet last night at The Cinema Society's special screening of the film, though, Delpy was laid back, complaining to a reporter and a sympathetic publicist about her unsupportive bra (she, a knockout, needn't have worried) and having, over and over, a Who's on First-style misunderstanding about which designer she was wearing: Not by Jenny Lai.

Chris Rock plays Delpy's boyfriend in the film, in a role Delpy wrote with him in mind. "I loved the first movie so much, that made me sensitive," Rock said. "Because I know people are going to compare the two, and I want to live up to it. I don't want people screaming for Adam Goldberg to come back." Few are likely to: his deadpan, restrained straightman act is one of the film's strongest features. We're particularly fond of a couple of scenes that find Rock all alone, chatting with a life-size cutout of Barack Obama.

Alexia Landeau is a riot in the film as Rose, sister to Delpy's Marion; she, her father, and her boyfriend come to visit Marion for a spell, with escalatingly awful results. Landeau's no stranger to travel horror; she and her husband traveled third-class in India on their honeymoon and were robbed. "We fell asleep, we took a sleeping pill, and we had all our bags stolen. It's so cheap there, we bought all the stuff and had everything copied. But because my mom was turning 55, I had bought her this thing at Gem Palace, which was this really fancy, tiny thing, and it got stolen," Landeau said. "I got back to New York, and I made my sister pay me anyway. She was like, 'I'm paying you for goods you're not delivering!'" (As for New York tourists, Ms. Landeau recommends skipping Serendipity in favor of the Brooklyn Bridge Park.)

Girls' Zosia Mamet knows New York City pretty well, we figured; what New York sights might she recommend to a short-term visitor? "There are a lot of New York things that I've never even done—like, I've never seen the Statue of Liberty," Mamet admitted. "I don't know if this is necessarily underrated, but I'm a sucker for the New York Zoo. And I think the natural history museum is one of the most incredible places on the planet. I have endless memories of lying underneath the whale in the whale room—I could just stay there for years." —Alexandria Symonds