#31: Gillian Anderson

Top 40 Over 40 Celebs

The truth is out there: "X-Files" star Gillian Anderson turned 42 on August 9, 2010. (Photo by Stephen Shugerman/Getty Images)

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#40: Kate Walsh "Private Practice" tough cookie Kate Walsh turned 43 on October 13, 2010. (AP Photo/Matt Sayles)

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#39: Molly Ringw... Yes, the star of "Sixteen Candles" blew out 43 of them on her last birthday cake. The John Hughes muse who channeled angst on the big screen for teenagers everywhere turned 43 on February 18, 2011. She's pictured here with fellow Hughes alum Anthony Michael Hall. (Photo by Frazer Harrison/Getty Images for AFI)

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#38: Patricia Ar... We'd like to know the psychic secret behind former "Medium" star Patricia Arquette's immaculate skin. The actress turned 42 on April 8, 2010. (Photo by Alberto E. Rodriguez/Getty Images)

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#37: Famke Janss... On November 25, 2010, former Bond girl and "Nip/Tuck" star Famke turned 46. (Photo by Stephen Lovekin/Getty Images)

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#36: Rachael Ray Culinary superstar, media mogul and star of a legendary sexy photo spread in FHM, Rachael Ray celebrated her 42nd birthday on August 25, 2010. (Photo by Frederick M. Brown/Getty Images)

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#35: Kristin Che... "Pushing Daisies" star and Tony Award-winner Kristin Chenoweth hit 42 on July 24, 2010. (Photo by Stephen Shugerman/Getty Images)

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#34: Kristin Dav... The 46-year-old star helped put the "sexy" in "Sex and the City." (AP Photo/Richard Drew)

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#33: Elizabeth H... The "Austin Powers" star is a very shaggable 45. (Photo by Pascal Le Segretain/Getty Images)

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#32: Gong Li Gorgeous Chinese actress Gong Li, who starred stateside in "Miami Vice" turned 45 on December 31, 2010. (Photo by Peter Kramer/Getty Images)

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#31: Gillian And... The truth is out there: "X-Files" star Gillian Anderson turned 42 on August 9, 2010. (Photo by Stephen Shugerman/Getty Images)

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#30: Tea Leoni Leoni turned 45 in February 2011. (Photo by Matt Carr/Getty Images)

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#29: Jane Krakow... Jane Krakowski, who stars as ditzy actress Jenna Maroney on "30 Rock," turned 42 on October 11, 2010. Krakowski is expecting her first child later this year. (Photo by Brad Barket/Getty Images)

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#28: Paula Abdul The verdict is in: "Idol" judge, singer and dancer Paula Abdul looks great for 48. (Photo by Stephen Lovekin/Getty Images)

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#27: Pamela Ande... Even "Baywatch" babes age--Pamela Anderson turned 43 on July 1--but the beach bunny hasn't lost a bit of her bikini bod, as evidenced by her recent strut down a fashion runway. (Photo by Kristian Dowling/Getty Images)

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#26: Teri Hatche... There's nothing "desperate" about this 46-year-old TV star. (Photo by Jason Merritt/Getty Images)

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#25: Heather Loc... It's hard to believe this stunning TV fixture is 49. (Photo by Kevin Winter/Getty Images)

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#24: Nicole Kidm... Awesome Aussie Nicole Kidman marked her 43rd birthday on June 20, 2010. (Photo by Stephen Lovekin/Getty Images)

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#23: Naomi Watts Mother of two Naomi Watts turned 42 on September 28, 2010. (Photo by Jason Kempin/Getty Images)

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#22: Michelle Ye... Is it the martial arts that keep the "Crouching Tiger, Hidden Dragon" star in fighting shape at 48? (AP Photo/Lai Seng Sin)

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#21: Debra Messi... Do redheads just age better? "Will and Grace" star Debra Messing looks flawless at 42. She was born on August 15, 1968. (Photo by Kevin Winter/Getty Images)

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#20: Vivica A. F... "Kill Bill" star Vivica is still a super-fox at 46. (AP Photo/Earl Gibson III)

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#19: Maria Bello "The Mummy" actress turned 43 on April 18, 2010. (AP Photo/Dan Steinberg)

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#18: Courteney C... This newly single "Friend" turned 46 on June 15, 2010. (Photo by Mark Mainz/Getty Images)

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#17: Marisa Tome... It's hard to believe "The Wrestler" star Marisa Tomei turned 46 on December 4, 2010. (Photo by Kevin Winter/Getty Images)

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#16: Brooke Shie... This "Pretty Baby" is all grown up - Shields turned 45 on May 31 - but the mother of two is still as stunning as when she purred " nothing comes between me and my Calvins." (Photo by Scott Wintrow/Getty Images For V-Day)

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#15: Ashley Judd Is it good genes or a gorgeous husband like Scottish race car driver Dario Franchitti that keeps Ashley Judd looking like a 22-year-old? The actress turned 42 on April 19, 2010. (Photo by Vince Bucci/Getty Images)

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#14: Mariska Har... Good genes might account for some of it ('50s bombshell Jayne Mansfield was her mom), but "Law & Order" star Hargitay is smokin' hot at 47. (Photo by Neilson Barnard/Getty Images)

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#13: Jennifer An... Everyone's favorite "Friends" star turned 42 on February 11, 2011. (Photo by Pascal Le Segretain/Getty Images)

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#12: Sandra Bull... She often plays goofy girls-next-door, but sexy Sandy is definitely a woman. The actress-producer and new mom celebrated her 46th birthday on July 26, 2010, and arguably had the biggest year of her career. (Photo by Peter Kramer/Getty Images)

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#11: Mary-Louise... The 46-year-old star of "Weeds" is as stunning as she was 20 years ago. (Photo by Andrew H. Walker/Getty Images)

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#10: Rachel Weis... It's hard to believe the gorgeous Weisz turned 41 on March 7, 2011. (AP Photo/Dan Steinberg)

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#9: Cindy Crawfo... The sexy supermodel remains superfierce at the ripe old age of 45. (Photo by Kevin Winter/Getty Images)

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#8: Lucy Liu This "Charlie's Angel" turned 42 on December 2, 2010. (Photo by Michael Buckner/Getty Images)

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#7: Julia Robert... The original "Pretty Woman" just seems to get more gorgeous with every passing year. Roberts turned 43 on October 28, 2010. (Photo by Kevin Winter/Getty Images)

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#6: Cate Blanche... She may have turned 41 on May 14, 2010, but this mother of three doesn't look a day over 20. (Photo by Vince Bucci/Getty Images)

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#5: Vanessa Will... Actress, singer and former Miss America Vanessa Williams is no "Ugly Betty" at any age, but it's hard to believe this youthful-looking lady turned 48 on March 18, 2011. (Photo by Todd Williamson/Getty Images for TV Land)

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#4: Salma Hayek The years have been very good to sultry star Salma Hayek. Valentina's mom turned 44 in 2010. (Photo by Frederick M. Brown/Getty Images)

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#3: Diane Lane Former child star and current hottie Diane Lane turned 46 on January 22, 2011. (Photo by Frazer Harrison/Getty Images)

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#2: Demi Moore Actress Demi Moore prefers younger men - and when you look like this at 48, why not? Moore is married to "No Strings Attached" actor Ashton Kutcher, who is 33. (Photo by Alberto E. Rodriguez/Getty Images)

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#1: Halle Berry Academy Award winner, mega-mom and number one 40 over 40 hottie Halle Berry turned 44 on August 14, 2010. (Photo by Jason Kempin/Getty Images)

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There's a Whole ... Check out Halle Berry's evolution through the years by clicking here!