Starring in perhaps TV most fashionable show - and dating stylish co-star Blake Lively - has taught Penn Badgley a thing or two about fashion.

Well, at least regarding what it says about a person: “What a woman wears says a whole lot about her confidence,” Penn tells Cosmopolitan.

Penn includes sweater dresses and V-necks amongst his favorite items to see on any woman: "A sweaterdress really can be the sexiest thing."

"As a man, I just like the simpler things,” says the Gossip Girl star. “A plunging V-neck looks like she pulled it off the floor of a man’s bedroom."

"There’s something so sensual about it.”

Penn Badgley sizzles in the new Cosmpolitan.

Penn Badgley is even a fan of fall’s hottest shoes, the over-the-knee boot. “If a strong, secure girl wears thigh-high boots, it can be stunning and powerful.”

At least Blake knows her on-screen friend and off-screen love appreciates her style! Not that it's a huge chore for him to be dating Blake Lively, we imagine.

Click to enlarge two more sexy shots of the 22-year-old actor (and a mystery blonde model) from the magazine's recent feature on him ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.