She had better luck with Zach Braff, who plays her boyfriend in the relationship drama The Last Kiss, opening today. Of her two high-profile smooches, the better kisser is "Zach, definitely!"

Barrett, 34, and Braff, 31, play two-thirds of a love triangle in The Last Kiss, which looks at relationships and what they mean as couples face adulthood. Braff's Michael and Barrett's Jenna live together in un-marital bliss — until Jenna gets pregnant. Faced with impending fatherhood, Michael meets college student Kim (Rachel Bilson). Relationship chaos ensues.

"Guys get a lot of flak for being afraid of commitment. And in this movie, it is more the guys, but just as many women go through that as well," Braff says during a group interview at the Four Seasons. "It's a human thing."

Bilson's Kim pursues Michael after meeting him at a wedding. She shows a different — and scantily clad — side of herself from the frisky but family-friendly Summer, whom she plays on Fox's The OC.

The actress, in a lacy black and white ensemble, chortles when asked whether she's a "playa" like Kim. "No, not at all! That's definitely where we're opposites."

Bilson is dating her OC co-star Adam Brody, whom she refuses to name or discuss in interviews. But the youngest of the Last Kiss trio at 25 feels no impetus to settle down. Women, she concedes, "do go through that pressure" to tie the knot. "Most people feel that pressure. I don't."

Barrett, in jeans and a black blouse, is soft-spoken and mild-mannered, and she hints that she's starting to feel another kind of pressure: to be a mother.

Braff, however, is in no hurry. Oozing self-confidence in a blue shirt, jeans and hipster sneakers, his hands behind his head, feet propped up on the table, the Scrubs doctor, now single after dating Mandy Moore, concedes he wants to have a family — someday.

Unlike his character, he's not conflicted about finding those first gray hairs. "I'm happier now than I ever have been. I wouldn't go back to my 20s," Braff says. "But you can't help but long for the freedom of your 20s. The idea of your 30s is more responsibility and one day getting married and having kids. When you're 31, there's no kidding yourself anymore."

At work, he is picking up more responsibility. He tweaked The Last Kiss script, written by Crash's Paul Haggis, though he downplays his contribution: "I just messed with it. I think I write pretty decent banter, so I added some."

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