The Big Bang Theory – Danica McKellar

Former Wonder Years darling Danica McKellar, who played Kevin’s neighbor-crush, Winnie, has grown up into one gorgeous nerd. She’s got a best-selling line of math books (the third comes out in August) and a collection of Star Wars memorabilia (including a life-size Stormtrooper) at the condo she shares with her new hubby, film composer Mike Verta.

So what better gig for her than CBS’ geek-friendly The Big Bang Theory, where she’ll make beautiful music with Rajesh (Kunal Nayyar) on the January 11 episode? “I play Abby, a sweet and social grad student at Cal Tech who is fascinated by India,” Danica says. “I get to play Rock Star with the boys.”

Just how nerdy was the set? “They had a bunch of copies of my math books for me to sign, and the first thing they asked me to do was rattle off the first 10 numbers of pi.” That’s easy. 3.14…9-0-2-1-0?