01/23/2012 12:56 pm ET | Updated Jan 31, 2012

Celebrity Birthdays: Which Post 50 Stars Were Born In January?

Happy birthday! What better way to start the new year than to blow out some candles and celebrate midlife? Diane Keaton, Jim Carrey and Kirstie Alley are some of the celebrities enjoying birthdays this month. Check out the slideshow below to see which other stars were January snow babies. Then scroll down a little further to take our trivia quiz to test your knowledge of these celebs.

Post 50 Celebrity Birthdays January