There are some celebs whose problems with drugs and alcohol - past or present - are well-documented. Stars like Charlie Sheen, Lindsay Lohan and Robert Downey Jr., seen here in their mug shots from 2009, 2010 and 2001 respectively. But still others flew under the radar with their issues...
Perry has previously struggled with an addiction to prescription drugs and alcohol and recently landed on the cover of People magazine to discuss his road to sobriety. While he was on "Friends," he said, "it would seem like I had it all. It was actually a very lonely time for me because I was suffering from alcoholism."
The "Sex and the City" actress told Health magazine in 2008 that unlike her cocktail loving character Charlotte York, she is a recovering alcoholic. The 48-year-old admitted that she was drinking so much, she didn't think she'd live past 30.
Affleck surprised friends when he checked into rehab for alcohol abuse in 2001, People magazine reported.
Jamie Lee Curtis has reportedly said she was once so addicted to prescription pain medicine that she stole some from a relative to help feed the addiction.
Jodie Sweetin, who played innocent Stephanie Tanner on "Full House," documented her drug problems in her memoir "unSweetined." A low point, she said, was using cocaine, meth and ecstasy while on tour to discuss her sobriety.
There have been questions as to whether or not Dylan was telling the truth when he reportedly told a journalist in 1966 that he had kicked a $25-a-day heroin habit, but, according to Rolling Stone, he had a period during his 1966 tour where he used "huge amounts" of amphetamines.
In 2012, the Black Eyed Peas singer told Oprah that her drug use proceeded from ecstasy to crystal meth. She became so paranoid she thought the FBI and SWAT teams were following her before she successfully sought treatment.
She was known for her wholesome role as Laura Ingalls on the television series "Little House on the Prairie," but at her worst Gilbert was covering up feelings of sadness by drinking up to more than two bottles of wine a night, the actress told More magazine.
The "Harry Potter" star told GQ magazine that he had his last drink in 2010. "There were a few years there when I was just so enamored with the idea of living some sort of famous person's lifestyle that really isn't suited to me."
A year before People magazine reported that the actress checked into a substance abuse facility in 2008, Mendes told reporters she "wasn't comfortable at all" and needed a cocktail to film a sex scene in 2007's "We Own the Night."
In 2004, a then 19-year-old Osbourne reportedly entered rehab for an addiction to pain killers. "The amount of pills that was found in her bag was astounding," her father Ozzy said.
Jackson was reportedly able to portray crack addict Gator in "Jungle Fever" so authentically because of his own past struggles with drugs and alcohol. He landed the breakout role two weeks after leaving rehab.
Johnston talked about her addiction to drugs and alcohol in her 2012 memoir "Guts" and admitted she was depressed during her time on "3rd Rock From the Sun." "And you're not supposed to be," she said. "You can't tell anybody, 'I'm so bummed you gave me an Emmy.' You can't be sad when you're being celebrated. So it was a big conflict and there's no shrink that can understand it."
The "Glee" star entered rehab for substance abuse in 2013. He had previously told Parade magazine that he started using drugs at 13 and by 19 had entered rehab after his mother and friends intervened. "I'm lucky to be alive," Monteith said at the time. "I had a serious problem."
The actress has said she gave up drugs and alcohol to be a better mother to her kids and better wife to John Travolta. "I don't drink anymore. I don't smoke anymore. I don't do drugs anymore. All of those come with an 'anymore.' I used to do everything and a lot of everything," she said.
Lynch wrote about her addictions to alcohol and cough syrup in her memoir "Happy Accidents." She told Access Hollywood in 2013 that she has been sober for 21 years.
Sir Elton John told USA Today that he swore off drugs and alcohol in 1990. He said, "If I ever find myself in a situation where there are drugs, I can smell the cocaine. I can feel it in the back of my throat, that horrible feeling of taking the first hit of cocaine. And I leave."
The country star said in an interview in 2013 that he replaced drinking whiskey with working out to clean his life up.
For those who may not remember because she has so completely turned herself around, Drew Barrymore entered rehab at the tender age of 13. Most fans were unaware that the then beloved child star partied so hard. She chronicled her early struggles in her memoir "Little Girl Lost."
It was years after Baxter portrayed one of America's favorite moms, Elyse Keaton on "Family Ties," that she revealed that she is a recovering alcoholic.
The Backstreet Boys member last checked into rehab in 2011. He had previously been treated for depression, anxiety and excessive alcohol consumption.
Country star and "American Idol" judge Urban told Oprah in 2010 that his wife Nicole Kidman and several close friends staged an intervention to help him overcome his addiction to cocaine and alcohol.