Celebrities who've battled with depression - Depression is a condition which affects over 300 million people across the globe, according to the World Health Organization. The illness can affect any of us, including celebrities. Famous figures who are sufferers have spoken out about their battles with the condition, to inspire fellow depressives and let them know that it is possible to overcome, with the right support.

Discover more about depression and the stars who have struggled with it.

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Definition - The American Psychological Association defines depression as much more than just feeling sad.

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Symptoms: inertia - The Association said that individuals who suffer from depression can lack any will to do simple, everyday tasks.

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Symptoms: weight - Another characteristic, according to the publication, is excessive weight gain or loss.

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Symptoms: tiredness - Uncontrolled sleep patterns and lack of concentration can also be symptoms of depression.

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Symptoms: insomnia - Despite this, people can suffer from insomnia, even though they feel tired and wiped out.

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Postpartum depression - Women can suffer from postpartum depression after giving birth.

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Postpartum depression - According to another study by the American Psychological Association, some of the symptoms of postpartum depression are: stress, anxiety, sadness, and exhaustion.

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Official figures - According to figures from the World Health Organization, which were released in 2017, it's estimated that over 300 million people around the world suffer from depression.

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Genetic factors? - In 2016, a study made by Nature Genetics revealed that depression can be traced through genetics.

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Study on artists - The BBC published data from a study from the Psychology department at Oxford, which showed a peculiar paradox. According to the information, artists who work in comedy are more likely to suffer from periods of social withdrawal, which can lead to depression.

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Cases of depression - But it's not just among comedians that depression pops up. There are also many celebrities in the music and movie industries who have suffered from the condition.

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Abraham Lincoln - An article published in The Atlantic revealed that the 16th president of the USA, Abraham Lincoln, suffered from depression throughout his life.

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Princess Diana - In an interview with the BBC in 1995, Diana said that she had been through postpartum depression.

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Demi Lovato - According to an article published by Variety, the signer was diagnosed with bipolar depression. After she made a recovery she got involved in the cause to help others with the same condition.

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Cara Delevingne - In an interview with Vogue in 2015, the actress and model revealed that she suffered from depression and self-harming.

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Lili Reinhart - The Daily Mail stated that the actress had used therapy to help her overcome her depression.

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Miley Cyrus - The singer admitted to battling depression in an interview with Elle magazine in 2014.

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Kristen Bell - The actress also revealed to Elle magazine that she had suffered from depression and taken medication for it.

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Kerry Washington - A loss of privacy in her life coupled with her mother's illness caused the actress to suffer a bout of depression, despite the awards she was winning at the time, according to Essence magazine.

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Brooke Shields - The actress wrote a book: 'Down Came the Rain: My Journey Through Postpartum Depression,' which told the story of the depression she suffered after giving birth to her kids.

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Prince Harry - Harry admitted to The Telegraph that he'd been in complete psychological turmoil after the death of his mother, Princess Diana, when he was just 12 years old.

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Lady Gaga - Various publications, including the site Health, revealed in 2016 that Lady Gaga had been battling depression. The singer said she wanted to open up about the problem in order to help fans that also suffered from the condition.

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Chrissy Teigen - The model told Glamour magazine in 2017 about her experience with postpartum depression.

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Jared Padalecki - The actor, who became famous for his performance in 'Supernatural,' opened up to Variety about his depression in 2015. He also spoke about a campaign he had launched to help people to cope with the condition.

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Beyoncé - The pop star told CBS News that she's suffered from a bout of depression when Destiny's Child split up.

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Adele - In an interview with Vanity Fair, the award-winning singer revealed that she had suffered from postpartum depression.

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Owen Wilson - The famous actor talked about his case of depression in 2007, when he was interviewed by the Independent.

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Gwyneth Paltrow - The actress suffered from postpartum depression after giving birth to her second daughter, according to 'Parenting.'

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Winona Ryder - The actress had an interview with New York Magazine in which she revealed that she had suffered from depression from an early age.

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Jon Hamm - The actor spoke out about the importance of getting medical assistance with depression, according to The Mighty.

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Robbie Williams - The Daily Mail and various other international publications recently shared information about Robbie William's battles with depression.

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Other cases - It's not just Robbie Williams and other celebrities who can overcome depression, this is something which every sufferer can achieve if they have access to the right medical help.

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