Chyna was found dead at age 46 in her California home on Wednesday, her manager said. The former pro wrestler and reality TV star was 46.
Redondo Beach police responded to a call from Chyna's manager and the manager of the apartment building she lived in, Lt. Todd Heywood said.
Officers found her dead on her bed. No were no signs of foul play, Heywood said.
The cause of death is being investigated.
In a statement, police said a "friend told Redondo Beach Police that the female had not answered her phone in a few days, and went to the location to check on her welfare."
Born Joan Marie Laurer, was a body builder in her teens in her hometown of Rochester, New York, and could reportedly bench press 325 pounds.
After graduating from the University of Tampa in Florida, she became in World Wrestling Entertainment in the late 1990s and was once the women's champion.
She also posed for Playboy, went on to make mainstream and adult films and wrote a bestselling autobiography "If They Only Knew," in 2001.
She was also featured in the reality TV shows "The Surreal Life" and "Celebrity Rehab with Dr. Drew."
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Her manager said she had been prescribed medication for severe anxiety and sleep deprivation, but said he didn't know if it was a factor in her death.
She's the latest of several pro wrestlers to die young, including Rick Rude, Curt "Mr. Perfect" Hennig, the Ultimate Warrior, Balls Mahoney and Owen Hart.