We often imagine celebrities as leading perfect lives - when you're rich and famous, what problems could you possibly have?
But the truth is, stars can suffer as much as anyone. Mental illness, as they say, does not discriminate.
Many celebs have been open about their struggles with mental health, helping to end the stigma that once surrounded conditions such as depression, anxiety, obsessive-compulsive disorder and bipolar disorder.
Demi Lovato has been open about her struggle with bipolar disorder, cutting and bulimia. "I never found out until I went into treatment that I was bipolar," she told People when she was 18.
Leonardo DiCaprio suffers from OCD, which he drew upon while playing Howard Hughes in The Aviator.
Lena Dunham suffers from obsessive-compulsive disorder, depression and anxiety, and even incorporated OCD into her character on Girls. She has taken medication for her conditions and told fans on Instagram that exercise helps immensely.
Funnyman Robin Williams suffered from depression, paranoia and anxiety and tragically took his own life in 2014. However, his widow Susan said her husband's death was a result of Lewy Body Dementia, a form of neurodegenerative dementia that causes mood instability, hallucinations and impaired motor skills.
Justin Bieber admitted to taking Adderall for ADHD, but recently quit because it gave him anxiety. Early in 2016, he canceled meet-and-greets with fans, saying they left him feeling "drained and unhappy" and "mentally and emotionally exhausted to the point of depression."
The movie star admitted that she used to cut herself as a teen. “I went through a period that when I felt trapped I would cut myself. I have a lot of scars,” she told OK! magazine.
The typically bubbly Kristen Bell admitted she suffers from clinical depression, which runs in her family, and has been taking medication for years. She also calls herself "extremely codependent."
Okay, he hasn't admitted to it, per se. But did you watch his Presidential campaign?!? One can actually be a clinical Narcissist.
Jessica Alba opened up about her OCD to CosmoGirl, telling the magazine, “It was like a panic would come over me and I had to do something, and once I did it, I was OK... It was really me needing to control something.”
After worrying fans with deeply erratic behavior in 2010, Amanda Bynes was placed on a 5150 hold and in 2014 revealed she struggled with bipolar disorder.
Russell Brand discussed his struggle with bulimia to The Guardian. “It was really unusual in boys, quite embarrassing. But I found it euphoric. It was clearly about getting out of myself and isolation. Feeling inadequate and unpleasant.” He is also in recovery for drug and alcohol addictions.
After achieving fame at a young age, Barrymore fell into drug and alcohol addiction and attempted suicide as a teenager.
It's sometimes hard to think of someone as hilarious as Jim Carrey being depressed, but the comic opened up about his history with the disorder on 60 Minutes in 2004.
The Nirvana front man was diagnosed with attention deficit disorder as a child, and later with bipolar disorder. His demons ultimately got the best of him and the star committed suicide in 1994.
The Teen Mom OG star battled postpartum depression after giving birth to daughter Novalee, which she sought treatment for in 2016. "I’ve always suffered from depression, anxiety and panic attacks,” she told Life & Style.
Diana, Princess of Wales
Princess Diana dealt with an ongoing struggle with bulimia and was thought to suffer from periodic depression.
Howie Mandell has been very open about his OCD, which he wrote about in his memoir, Here's the Deal: Don't Touch Me.
Irish singer Sinead O'Connor took to Twitter to ask for psychiatric help for her bipolar disorder in 2011, and in 2012 canceled concerts after suffering a "severe breakdown."
The Star Wars actress has spoken out about her issues with bipolar disorder for many years. "I am mentally ill. I can say that. I am not ashamed of that. I survived that, I’m still surviving it, but bring it on,” she once said.
Janet Jackson fell into a deep depression following the release of her sixth studio album The Velvet Rope. She has also dealt with issues of body dysmorphia and self-harm.
Halle Berry suffered from postpartum depression and admitted to attempting suicide following her divorce from David Justice.
The Chicago Med actress spoke out about her anxiety disorder during Mental Health Month in May 2016.
The iconic crooner has battled depression and attempted suicide in his 20s.
Catherine Zeta Jones
The Welsh beauty was diagnosed with bipolar disorder in 2011 following her husband Michael Douglas' battle with throat cancer.
Before his untimely death in 2008, Heath Ledger struggled with insomnia, depression and substance abuse.
Click on the headline above to learn what Shelley Duvall told Dr. Phil in a disturbing interview.
Lady Gaga suffers from PTSD. Click on the headline above for more.