Oh without a doubt some of them lie. Allison has been hanging on to 39 for years. Jill pick an age and stick with it. I think she just kept passing out numbers in hopes that one of them would be beliveable.
I think some of the woman lie for one reason only. They want to be "A STAR" They want in with the biz and know that youth is king. Like Allison and Jill. Now this Lisa is 51 and has no reason to lie because she has no interest in being an actress.
I also believe some of them do it because they are so ashamed of being as old as they are and not having their stuff together.
Dolly Parton said it best in Steel Magnolias "Time marches on and eventually you realize it marches right across your face" (hey Steel Magnolia Allison, learn the lesson. NO ONE believes your still in the 30's)