CELEBRITY BIRTHDAYS (3/31/11): CHRISTOPHER WALKEN - 68    He's been in more than 100 movies and television shows, but for many of us, he'll forever be  the "more cowbell" guy in the now classic "SNL" skit ...

--Ewan McGregor - 40   Help me Obi-Wan Kenobi ...

--Al Gore - 63   Former Vice President. Mr. Global Warming.

--Rhea Perlman - 63   Carla on "Cheers".  Danny DeVito's woman ...

--GABE KAPLAN - 66   Mr. Kotter ...

Gabe will joins the rest of the "Kotter" cast for a reunion at the TV Land Awards April 17th.  Well, except for Mr. Woodman, because the actor who played him died in 1988. 

--Richard Chamberlain - 77   Mantastic star of the '80s. He's a proudly out-of-the-closet gay man these days.

Perhaps you remember him as the randy priest from "The Thorn Birds"?  Tricia does! ...

--Shirley Jones - 77    Singer and actress who's been on television for six decades, but probably best remembered as the mom on "The Partridge Family"

Don't let the gray hair fool you. She was quite the hottie in her day ...