Okay, so I just checked this out as a procrastination device: the following are famous people who share my birthday:

Sarah Michelle Gellar
Anthony Michael Hall
Pete Rose
I thought it would be more than that, but it's not. The first two are good ones though. I should give them a call and be like, "Oh My God! We have the same birthday!! Maybe we're twins? I love you." I think that they would respond well. They would come back with, "Yes, yes we are. (click)" Ah love celebrities. Here is a link to the full list, but these are the three that I noticed.