Happy Birthday to the following celebrities born on April 9th. Hugh Hefner is is 82 (damn!), Dennis Quaid is 54 , Jenna Jameson is 34, Cynthia Nixon is 42, Paulina Porizkova is 43, Jesse McCartney is 21, and Kristen Stewart is 18.

Did you know…

If you don’t know Hugh Hefner, you must be living under a rock somewhere. The ultimate Playboy himself is turning 82 today. Hef, is the founder, majority owner, editor-in-chief, and Chief Creative Officer of Playboy Enterprises. On July 1, 1989, he ended a 30-year run as a bachelor and married Kimberley Conrad, that year’s Playboy Playmate of the Year. They separated in 1999, though have yet to divorce. Hefner has 4 children: Christie Hefner who is 55, David Hefner is 53, Mildred Williams, and Marston Hefner who are 18, and Cooper Hefner who is 17. You can catch him every week on the E! TV show, The Girls Next Door.

Dennis Quaid was once married to Meg Ryan and divorced her after she had a scandalous affair with Russell Crowe. In a 2006 interview with Best Life magazine, Quaid said that in the mid-1990s he suffered from anorexia nervosa, saying, “I’d look in the mirror and still see a 180 lb (82 kg) guy, even though I was 138 pounds (62 kg),” and “for many years, I was obsessed about what I was eating, how many calories it had, and how much exercise I’d have to do”. Most recently, his wife gave birth to twins at Cedar Sinai hospital. On November 20, 2007, hospital staff mistakenly gave Quaid’s twelve-day-old twins a dosage of heparin 1,000 times the common dosage for infants. Their attorney said the newborns will “be fine now”, but Quaid has filed a lawsuit against the drug manufacturer, Baxter Healthcare, claiming that packaging for the two doses of heparin are not different enough.

Cynthia Nixon, one of my favorite Sex and the City actresses, lives in Brooklyn, New York. Nixon is a breast cancer survivor, but due to the stigma of having cancer in Hollywood, she did not go public about it for two years. In March 2008, Fox News reported that Nixon has been in a lesbian relationship with Marinoni since 2003. The new Sex and the City movie hits the theaters in May 2008.

Jenna Jameson says that she started acting in pornographic films in revenge for her boyfriend, Jack, cheating on her. The rest of course is history. Jameson’s first pornographic film appearances were female only lesbian scenes. She says: “Girl-on-girl was easy and natural. Then they offered me lots of money to do boy-girl. Today, she earns more then $30 million a year with her popular porn site, Club Jenna. You catch her in the upcoming film, Zombie Strippers.