Wait, I just realized your age thinking about this thread last evening. You seem so young at heart, almost like a big kid! 
What a beautiful thing to say! Thanks.
Within 10 days on either side
Peter Weller (exactly)
Anette Bening
Drew Carey
Jane Wiedlin
Ted McGinley
But if you look at my YEAR… a pretty major selection, including Madonna, Michael Jackson and a whole bunch of others. 1958 was a pretty big boomer year.
Judy Star (uh, don’t Google that one at work) has the same birthday.
Jay Baruchel (one of the Rogen/Apatow regulars) was born one day after me.
Chyler Leigh (of Not Another Teen Movie [shut up, I like that movie]) two days after me.
Seth Rogen one week after me.
Sarah Jessica Parker (3/25/65), born one day after I was.
I’m one day older than Tricia Helfer and a day younger than Jenna Jameson. I choose not to choose between them, I like where I am just fine…
Natalie Portman was born nine days before me.
I searched wikipedia to find a closer one who I’d heard of, and found Chris Evans (the Human Torch from The Fantastic Four), born five days before me.
Man, what have I done with my life? Tiffany Mynx was born the same day as me, and she’s been in 258 movies! I haven’t even been in one!
If you haven’t heard of Tiffany*, I guess I’d go with Johnnie Morton (3 days older than me), or Sacha Baron Cohen (3 days younger).
*How could you not have heard of her? She’s been in two hundred and fifty eight movies!
I didn’t recognize anyone born on my same day.
Hockey player Brendan Shanahan is two days older than me. If he’s not well known enough, Katheryn Morris and Mo Rocca are three days younger.
Mary Elizabeth Mastrantonio was born the same day as me.
Anne Hathaway and I were born on the exact same day. 
Sarah Michelle Gellar is four days younger than I am.
Hmm, we’re in the same ballpark, but since Rebecca de Mornay is 12 days closer to my birthday and not an insane cult leader, I’m going with her.
I’m not familiar with actress Andrea Anders (whose credits include Oz, Joey, and Better off Ted), but apparently we share a birthday.
Enrique Iglesias was born two days before me.
I’m two days younger than Eric Mabius and eight younger than David Tennant.
I share April 24 with Omar Vizquel and Eric Kripke. Good enough for me.
Sean Lennon was born on the same day and year as me. John Lennon and Sean Lennon were also born on the same day, in different years, which is an odd coincidence.
This does now mean I’ve told you all my exact birthdate. Oh well.
Wow - Prince Andrew and I were due at the same time, and I beat him by one day. He was born on 2/19/1960. My mom also followed news of the impending Royal birth closely.
Eric Dane from Grey’s Anatomy and I have the same birthday.
We have the same birthday, but in different years.
Deion Sanders (former pro football and baseball player, for our non-American friends) was born 5 days after me.