Celebrities who celebrate birthdays in January

6 of 65: Danica McKellar turns 38 on January 3, 2013. The actress is known for her role as Winnie Cooper in the television show 'The Wonder Years.' The show starred a young Fred Savage as her love interest, Kevin Arnold.

McKellar is also a math scholar and has penned several math books, including 'Math Doesn't Suck: How to Survive Middle-School Math Without Losing Your Mind or Breaking a Nail' and 'Hot X: Algebra Exposed.'

Pictured: Danica McKellar talks to OTRC.com on Dec. 15, 2011 at a Los Angeles party to celebrate the 100th episode of CBS series 'The Big Bang Theory.' The actress appeared on the show in 2010. (OTRC Photo)