1. River Phoenix (1970-1993)

Source: Columbia Pictures
In 1988, Phoenix garnered an Academy Award nomination for Best Actor in a Supporting Role for his portrayal of a counterculture couple’s son in Sidney Lumet’s Running on Empty. The following year, he had a small role as a young Indiana Jones in Steven Spielberg’s Indiana Jones and the Last Crusade. In 1991, Phoenix delivered yet another critically acclaimed performance as a narcoleptic street hustler in Gus Van Sant’s My Own Private Idaho.
While it appeared that this young actor was well on his way to becoming a major movie star, sadly, this was not to be. In the early morning hours of October 31, 1993, Phoenix collapsed outside of a nightclub in Los Angeles in front of his brother Joaquin and sister Rain. Phoenix was rushed to Cedars-Sinai Medical Center, where he was pronounced dead. As noted by The New York Times, the coroner reported finding “deadly levels of cocaine and morphine” in his system. He was only 23 years old.
2. Corey Haim (1971-2010)

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Unfortunately, even while his acting career was taking off, Haim’s personal life was spiraling out of control. As noted in Feldman’s memoir Coreyography, both actors were introduced to hard drugs like cocaine at a young age. Feldman also claimed that they were both sexually abused as children by people in the movie industry, and that the trauma of that abuse likely fueled Haim’s self-destructive behavior. As Haim’s popularity began to wane in the early 1990s, his drug addictions became even more serious, despite multiple attempts to get clean with stints in rehab.
On March 10, 2010, an unresponsive Haim was found by his mother in the apartment that they shared. After being transported to a hospital, the 38-year-old Haim was pronounced dead. According to Access Hollywood, the coroner determined that the cause of death was due to pulmonary congestion and not a drug overdose, as many people initially assumed. However, it is widely believed that Haim’s years of drug abuse indirectly contributed to his death by taking a toll on his overall health.
3. Gary Coleman (1968-2010)

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Unfortunately, despite the fame that Diff’rent Strokes brought him, Coleman was plagued with money problems for most of his life. As an adult, he discovered that his parents and agent had misappropriated his childhood earnings. After a successful lawsuit, Coleman was awarded $1.3 million, as reported by Jet magazine. As he got older, Coleman gained further tabloid notoriety for multiple altercations with fans.
He was also cited for disorderly conduct for several incidents involving actress Shannon Price, his girlfriend and wife. Tragically, Coleman’s many health issues likely contributed to his early death at the age of 42. On May 28, 2010, after sustaining injuries due to a fall in his home, the troubled actor passed away from a brain hemorrhage at a hospital in Utah.
4. Brittany Murphy (1977-2009)

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On December 20, 2009, Murphy was taken to the hospital by emergency services after collapsing in her home. She was pronounced dead after going into cardiac arrest. According to the autopsy report obtained by CNN, Murphy had “acute pneumonia” and was suffering from a “chronic iron deficiency.” The report also noted the presence of multiple cold medications in Murphy’s system that may have contributed to her death. Murphy was only 32 years old.
Although Murphy’s death was ruled accidental, various conspiracy theories have emerged that blame her death on everything from toxic mold to harassment by the U.S. Department of Homeland Security, as reported by The Huffington Post. The mystery surrounding this young star’s untimely death only deepened after Murphy’s husband, Simon Monjack, died under similar circumstances five months later in the same house.
5. Paul Walker (1973-2013)

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However, his greatest career success came as an adult, when he was cast as Brian O’Conner in 2001’s The Fast and the Furious. The box office success of The Fast and the Furious led to roles in other major motion pictures, including Timeline, Into the Blue, and Flags of Our Fathers. He reprised his role as Brian O’Conner in five sequels to The Fast and the Furious, including 2015’s blockbuster Furious 7.
On November 30, 2013, Walker left a benefit event for his Reach Out Worldwide charity in a Porsche driven by a friend. The driver soon lost control of the car, and the subsequent fiery crash killed both men. According to investigators cited by CNN, the cause of the accident was “unsafe speed for the roadway conditions.” Walker had recently turned 40 years old.
6. Heather O’Rourke (1975-1988)

Source: Warner Bros.
Sadly, Poltergeist III was to be the last film that O’Rourke would ever make. Several months before filming began, O’Rourke became ill and was misdiagnosed as having Crohn’s disease. Unfortunately, the misdiagnosis was not discovered until it was too late. On January 31, 1988, O’Rourke collapsed and was rushed to the hospital. According to the Los Angeles Times, doctors at the hospital where she was brought found that her illness was caused by a longstanding bowel obstruction. An attempt to surgically remove the blockage led to septic shock and caused her to suffer a cardiac arrest. O’Rourke was just 12 years old when she passed away.
7. Dana Plato (1964-1999)

Source: Embassy Pictures
Despite the fame she achieved as a star on Diff’rent Strokes, Plato found it difficult to find quality work after leaving the show. In the late ‘80s and early ‘90s, she starred in several forgettable B-movies and posed for Playboy magazine. Around the same time, Plato was beset by several personal tragedies when her husband divorced her, her mother passed away, and an accountant stole most of her money. She also lost custody of her son due to her ongoing drug and alcohol problems. In 1991, Plato hit rock bottom when she was arrested for a comically inept video store robbery that earned her five years of probation and a stint in a rehab program.
Unfortunately, Plato was never able to fully kick her drug habit. On May 8, 1999, the 34-year-old Plato was found dead of a drug overdose by her fiancé in their Winnebago motor home. According to People magazine, a medical examiner ruled her death a suicide.
8. Rob Knox (1989-2008)

Source: Warner Bros.
On May 24, 2008, Knox was stabbed five times in the chest outside a bar in London as he was trying to defend his brother from an attacker, reported the BBC. Knox was only 18 years old when he died. His attacker — Karl Bishop — was sentenced to life in prison with no possibility of parole for 20 years in 2009.
9. Brad Renfro (1982-2008)

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After having already been cited for drug possession in the late ‘90s, Renfro earned further notoriety when he was arrested in 2000 for attempting to steal a yacht, as reported by the Spartanburg Herald-Journal. In 2002, he was ordered into a three-month rehab program following an arrest for public intoxication. In 2005, Renfro was arrested for attempting to purchase heroin from an undercover police officer in Los Angeles. On January 15, 2008, the 25-year-old Renfro was found dead of a heroin overdose by his friends.
10. Bobby Driscoll (1937-1968)

Source: Walt Disney Productions
Unfortunately, Driscoll found it difficult to shed the child star image even after Disney terminated his contract when he got older. After a difficult stint at a public high school, Driscoll began abusing drugs and was eventually jailed in 1961. Unable to find work in the mainstream movie industry after his release, Driscoll headed to New York, where he appeared in Piero Heliczer’s experimental film Dirt and briefly joined Andy Warhol’s art community known as the Factory.
On March 30, 1968, two children discovered Driscoll’s body in an abandoned tenement building in New York. After no came forward to claim the body, the city buried him as a “John Doe” in an unmarked grave. Driscoll’s fate wasn’t discovered until over a year after his death, when his mother made inquiries about his location and postmortem fingerprints were used to identify him. Driscoll was 31 years old when he died.
Bobby Driscoll biographical details are courtesy of IMDb.