Catherine Zeta-Jones revealed in 2011 that she is suffering from bipolar disorder which caused an extreme form of depression.

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Actress Ashley Judd contemplated suicide when she was in the 6th grade. She was also treated at a rehab clinic for depression in 2006.

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Mad Men actor Jon Hamm went through depression when he was just 20 triggered primarily by his father's death. He went through therapy and used anti-depressants to recover.

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Photo Gallery: Signs your child is not ready for a pet

Mad Men actor Jon Hamm went through depression when he was just 20 triggered primarily by his father's death. He went through therapy and used anti-depressants to recover.

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Photo Gallery: Signs your child is not ready for a pet

Paulina Porizkova experienced anxiety attacks when she was taken off the show, Dancing With The Stars. She was given antidepressants.

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Who would have thought that Demi Lovato had personal issues? In 2010, she checked into a facility to get help for emotional and physical problems. The Disney actress revealed she suffered from bulimia, anorexia and bipolar disorder.

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Owen Wilson had his problems with drug addiction and battled with depression & attempted suicide in 2007. He has since recovered through spending time with family and good friends.

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Owen Wilson had his problems with drug addiction and battled with depression & attempted suicide in 2007. He has since recovered through spending time with family and good friends.

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Photo Gallery: Signs your child is not ready for a pet

Actress Gwyneth Paltrow did not know she was suffering from postpartum depression until her husband brought up the idea. Although she had no problems when her daughter was born, she experienced postpartum depression after she delivered her son in 2006.

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Believe it or not postpartum depression does not only hit women who have given birth to babies. Actress Marissa Jaret Winokur went through this experience when her son was born through a surrogate in 2008.

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Actor Heath Ledger revealed he suffered from insomnia. Unfortunately, he overdosed on painkillers, anti-depressant drugs and sleeping pills. He passed away in 2008.

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This list is not complete without Princess Diana who died in a tragic vehicular accident in Paris in 1997. The Princess of Wales was overwhelmed in her role as a mother and the wife of a prince. She suffered from an eating disorder and depression. Princess Diana received very little support from family and friends.

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This list is not complete without Princess Diana who died in a tragic vehicular accident in Paris in 1997. The Princess of Wales was overwhelmed in her role as a mother and the wife of a prince. She suffered from an eating disorder and depression. Princess Diana received very little support from family and friends.

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Photo Gallery: Signs your child is not ready for a pet