Gossip Girl star Blake Lively (in Marc Jacobs) takes the February 2009 cover of Vogue.

“The fashion is just unbelievable [on Gossip Girl],” the 21-year-old actress tells the mag. “You can watch our show on mute and be entertained.”

“Just being here [in New York City], walking around, you pick it up really quickly,” Blake explains of her evolving fashion sense. “In New York, you put on skinny jeans and riding boots and a leather coat and handbag, and you take on that posture and character. It becomes very natural.”

You’ll want to check out Vogue.com tomorrow to see some video footage of Blake with on-and-off-screen boyfriend Penn Badgley on the set of Gossip Girl!