New York, March 31, 2008 – Dennis Quaid has been a busy man, with several movies in production, plus the birth of twins Thomas and Zoe last November.  Quaid reunited with Smart People co-stars Sarah Jessica Parker and Thomas Hayden Church for the Cinema Society premiere in Lower Manhattan on Tuesday.  Quaid says his five-month-old twins are doing great, and that he changes diapers, even though he doesn’t like doing it.  (The much more grown up Juno star, Ellen Page, plays his daughter in Smart People.)  SJP and hubby Matthew Broderick were among the first to arrive at the theater, driving up in a regular car rather than a limo.  Parker Posey and Jane Fonda slipped in unnoticed, and guests including Ellen Barkin, Rachel Dratch and a very glamorous looking Cynthia Nixon headed on to party at the Bowery Hotel post-screening.