Helena Christensen Steps Out with Interpol Rocker
updated 03/27/2008 AT 04:20 PM EDT
•originally published 03/27/2008 AT 12:00 PM EDT
The two were seen kissing and holding hands Wednesday night at the launch of Tocca Vintage at Butik, her store in New York's West Village.
A source close to Christensen told PEOPLE, "They've been together for a little while now. [Banks is] very sweet and nice and bright – not a party person."
Though she was tight-lipped about her mysterious date, it didn't stop her from sneaking kisses with him the entire evening. She told PEOPLE, "I don't talk about my private life, I've learned from all the other very smart artists out there."
Meanwhile, she's been easy to spot near the stage at recent Interpol shows, and Christensen recently revealed in a statement through a representative: "I have dated someone quietly for half a year now."
–Susan Yara and Jeffrey Slonim