I win. I’ve got Natalie Portman. 
Christian Bale and I were born on the same day.
Rose McGowan was born the day before me, Shannon Elizabeth the day after.
Unfortunately, through this little game I found out RMcG is taking on the titular role in the impending Red Sonja. Yikes.
Ashley Parker Angel is a day older than me. I’ve heard of him, but he’s not all that famous. No, you have to go a little farther in the other direction for real fame–Roger Federer! Blake Lewis, who almost won American Idol, is just a tad bit older than me, as is Summer Glau. That’s everyone I recognize.
I am two days older than Reba McEntire.
I do not share my actual birthdate with anyone famous (and the closest I get is 4 days).
I share the same birthday (month and day, but not year) with:
Shia LaBeouf
Hugh Laurie
Joe Montana
Adrienne Barbeau
Gene Wilder
Vince Lombardi
Jacques Cousteau
Huh. Interesting group!
As an odd coincidence, Jeff Bridges (Beau’s brother) was born on my 8th birthday.
Denzel Washington, born Dec. 28, 1954, is three days older than me!
I am two days younger than the lovely Lisa Edelstein.
The closest person whose name I recognized is Emily Procter, one day away.
Hey, we share a birthday! (Except that you’re a year older than me)
You beat me by a week - I was born the following Friday. I have no idea who all those other June names are though, with one notable exception: Tobey Maguire, born two weeks after me, on the 27th. I’m older than Spider-Man!
Heather Graham was born 5 days before me
AND
we were both born in Milwaukee.
How do I find out if it was the same hospital?
I was born one day before Kimmie Nipples and the same day as Peter Shaft. That amused me. I was born two days after Katie Holmes, which I already knew. I was born three days before Holly Madison of “The Girls Next Door” fame and Estella Warren of the new “Planet of the Apes” fame. NFL player Deuce McAllister was born a week after me. MLB player Chase Utley and boxer Manny Pacquiao were born three days before. MMA star BJ Penn was born a week prior.
I share a birthday with magician Hans Klok and “What Not to Wear” expert, Clinton Kelly. If that’s not famous enough, then Robert Sean Leonard (James Wilson on “House”) is the closest and I’m 6 days older than him.
Cynthia Nixon was born the same day as I was.
Baseball great Rod Carew (AL Rookie of the Year 1967)
Huh, looks like Joshua Jackson (“Fringe,” “Dawson’s Creek”) is one day older than I am.
Of the actors who share my birthday (June 12), Scott Thompson of the Kids in the Hall is by far my favorite. I’m 19 years younger than he.
Kobe Bryant and I were born 6 days apart.
I didn’t see any recognizable celebrities on my birthday, but I’m one day older than Claire Danes and Jennifer Morrison.