Happy Non-Fathers Day

Actor George Clooney told People, "I'm so selfish and I get nervous around kids... I've settled into a very comfortable lifestyle and I really don't want to change things. I've learned enough about myself to know that my work is the main thing which drives me and whatever woman comes into my life is going to have deal with that, which isn't easy."

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'Tonight Show' host Jay Leno has been married to Mavis Leno since 1980 and are childless by choice.

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Actor Christopher Walken has been married to Georgianne Walken since 1969. They live in rural Connecticut and have no children. Early in their marriage, they agreed to not have kids, so they could focus on their careers.

Duffy-Marie Arnoult, WireImage

'American Idol' judge Simon Cowell admits his TV shows mean more to him than kids. "There are some things that you have to sacrifice. You can't have everything. If you're working long hours, sometimes until three or four in the morning, it's difficult to have a child. You can't come home and deal with a screaming baby. My shows, my work, are my babies," Cowell told ContactMusic.com.

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Although actor Steve Martin has been married twice, he still has no children. He was married to actress Victoria Tennant from November 20, 1986 until 1994 and then married Anne Stringfield on July 28, 2007. "[Children] are very, very sweet. Sometimes they're just, fascinating and cute even though I know there is the dark side," Martain told FilmMonthly's reporter Paul Fischer.

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Singer Robbie Williams told PEOPLE that he doesn't want kids because he doesn't want them to endure life's harsh misery like he has. The singer who has battled alcoholism and depression said, "I don't believe that to be fulfilled you have to have kids. What's the point? I can't guarantee my child won't suffer pain

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'Friends' actor David Schwimmer is 42 years old and still playing the dating scene. He's currently linked to British photographer Zoe Buckman but doesn't seem to be interested in having children.

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Actor Mike Myers married Robin Ruzan in May 2003 but divorced 12 years later. They had no children together.

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'The Wrestler' Mickey Rourke admits his dogs are his children. During the 2009 Golden Globes show, he told Barbara Walters that "I sort of self-destructed and everything came out about fourteen years ago or so ... the wife had left, the career was over, the money was not an ounce. The dogs were there when no one else was there... I don't have kids, so the dogs became everything to me," he said.

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Comedian Bill Maher is blunt about not wanting kids, even though he admits to lying about it in the past. He told The Pittsburgh Post-Gazette, "When I was 28 years old and a girl said to me, 'Do you like children?' I'd go, 'Well, you know, not right now, but I think someday.' That was a complete lie. I never liked children. I never wanted children."

Jason LaVeris, FilmMagic