Celeb Birthdays: March 17

Unlike their Sweet Valley High alter egos, twins Brittany and "Whatever Happened to the Other One," I mean, Cynthia Daniel, are subject to the passage of time. The erstwhile Jessica and Elizabeth Wakefield hit the big 3-0 today.

Hole's Melissa Auf Der Maur, 34, shares a birthday with her sometime Smashing Pumpkins confrere, Billy Corgan, who still seems to be wrestling with adolescent angst (and a "Pisces Iscariot" martyr complex) at 39.

Soccer siren and Bride of Noamahhh Mia Hamm is 34.

Fashion designer Alexander McQueen turns 37 today.

A perennial dreamboat at 42, Rob Lowe definitely knows how to work those Pisces bedroom eyes.

Namaste to old soul Dana Reeve, who would have been 45 today. I'd like to think the universe had a good reason for giving her an early graduation from her last incarnation, like, maybe she got cosmic extra credit for working through so much karma in one lifetime. Hopefully she's already been reborn as a boddhisatva.

Because I have much love for the Hey! It's That Guy!s of the world, I would like to acknowledge the 46th birthday of TV staple Arye Gross.

A H!ITG! emeritus himself, Gary Sinise, is 51.

'80s stud muffins Kurt Russell, 54, and Patrick Duffy, 57, will be enjoying birthday cake with their green beer today.

Sci-fi author William Gibson is 58.

Birth dates from IMDB.com. Please email me any corrections, additions or -- especially appreciated! -- exact birth times.