Holy mama! More than ever be fore, pregnant celebrities are throwing sheaths and muumus to the wind, and showing off their beautiful bellies and bountiful cleavage with tighter, more fitted clothing.

From Elizabeth Hurley to a naked Anne Heche (wearing only a Roberto Cavalli caftan) in this month's Vogue magazine, expectant moms are coming out of the baggy-clothes closet. 

They're attending award shows and parties, dressed like the same old stylish and sexy selves they are known to be  only with a hot, new midriff accessory. 

"It's no longer considered an embarrassment," says Kim France, Editor-in-chief of Lucky magazine. "We're a long day from when people wore big clothes like Mia Farrow in Rosemary's Baby with the puff and the big bow. 

"There's something about the shape of the belly that's pleasing, something about letting it hang out." 

Maternity designer Liz Lange  who has dressed everyone from Catherine Zeta-Jones to Tea Leoni in her stretchy fabric and knit clothing agrees, noting that "pregnancy is a very sexy time because obviously the whole thing is about sex. 

"Celebrities know what they want. They want pants that fit under their belly rather than over. They want to show off their new figures," she says. 

"During Cindy Crawford's first pregnancy, she would say, 'the tighter the better.' Whatever I could send her that was small, she wanted smaller." 

And Anne Heche points out in the April issue of Vogue: "You cannot walk around wearing a tent. You look like you have no body. You can't feel good about yourself like that. You're covering up. It's about shame." 

This "no shame" feeling has trickled down to the average woman, who realizes that it does look and feel better to show off her belly, after seeing her favorite celebrity do so. 

And designers like Lange, Pea and the Pod and Pumpkin Maternity are jumping on the "proud of my belly" wagon, focusing more on fitted cashmere sweaters and low-rise jeans. 

"In the past they weren't being offered stuff like this," says Lange. "The clothes that they couldn't fit into weren't sexy. Now, instead of sitting in front of the TV, they are really participating and that's sexy. The confidence is sexy." 

Former Family Ties star Justine Bateman, who is seven months pregnant, recently designed her own sexy, bohemian top with black-pants ensemble for an event last weekend at Bergdorf Goodman, where she showcased her line of clothing. 

"I feel like at this point for me, I can't hide it," Bateman told the Post

"I find the pregnancy clothes very conservative and tent-like. And my usual uniform doesn't work in a bigger size. I wanted something a little funkier, drapier and comfortable, and I might be doing a maternity line soon." 

She also added: "My body changed so much that if on top of that I have to wear clothes that are not me, it would be kind of depressing. I want clothes that are colorful and not black and plain." 

And the hubbies love it. 

"My husband is so great with it," says Bateman, 36. "There's not been a second where he's done or said anything that's made me feel bad. He just keeps saying 'you're all woman.'"

For more news, entertainment and sports coverage, click here for NYPost.com.