Sexiest Man Alive 2007

8 Hottest Guys on Fall TV

From Michael Vartan to Peter Krause, see who's heating up the small screen in debut shows. By Brian Orloff and Karen J. Quan

PENN BADGLEY

Gossip Girl (The CW, 9 p.m.)
Premieres: Sept. 19
As the sweet outsider who courts the popular Serena van der Woodsen on Gossip Girl, Badgley, 20, knows what it's like not being in the "in" crowd. "I wasn't a loner, but I wasn't the coolest kid either," the actor, who plays Dan Humphrey, told CosmoGIRL. But, it turns out, popularity isn't all that. "[Dan's] an outcast, and I think that contributes to him being a good guy," he tells PEOPLE.