Celebrity Parents Matthew Broderick Nervous About Twin Girls Sarah Jessica Parker's hubby says their son is "pretty excited" about getting two sisters By People Staff Published on May 8, 2009 05:50 PM Share Tweet Pin Email Photo: Michael Loccisano/Getty Matthew Broderick, who is expecting twin daughters with wife Sarah Jessica Parker, insists, “Yeah, I’m ready” – well, almost. “Oh man, I’m nervous just even thinking about it,” the actor, 47, said Friday on the Late Show with David Letterman, in his first interview since he and Parker, 44, announced they are having twins via a surrogate. “You know, I’ve asked people, ‘What’s it like to have twins?'” Broderick tells Letterman. “One father said, ‘I don’t recommend it,’ but the rest have been very positive.” As for the couple’s 6-year-old son James Wilkie, “He’s pretty excited” – and already making a shopping list, according to Broderick. “He said, ‘We have to get a lot of princess toys.’ ”– Mike Fleeman RELATED GALLERIES:• SJP trades in her Manolos for playdates with son James Wilkie!• PEOPLE Covers: Twins take over Tinseltown!