Former World Wrestling Entertainment (WWE) star Chyna was found dead in her Los Angeles home on Wednesday (April 20). She was 45.

The official cause of death is unknown, though police are reportedly treating the case as a possible drug overdose.

The former wrestler and reality TV star was found unresponsive in bed after not answering her friend's calls for a few days, CNN reported.

"There are no indications or signs that her death was the result of foul play," police said.

Chyna, whose real name is Joanie Laurer, last appeared in a YouTube video posted on Sunday, in which she appeared to be intoxicated.

A post on Chyna's Facebook page on Thursday confirmed her death.

"It is with deep sadness to inform you today that we lost a true icon, a real life superhero. Chyna will live forever in the memories of her millions of fans and all of us that loved her," the post read.

In a statement, WWE said Chyna was a "physically striking and talented performer", and a "true sports-entertainment pioneer".

Dubbed the "Ninth Wonder of the World", she was a founding member of groundbreaking WWE faction D-Generation X, and also holds the distinction of being the first woman to enter the 30-man Royal Rumble match.

She was also the first and only woman to win the WWE Intercontinental Championship.

A larger-than-life character out of the ring as well, Chyna also appeared on reality TV, magazines, music videos and in adult films.

Her 2001 autobiography, titled If They Only Knew, described her as "part feminist, part superhero, Chyna blazed a trail where no woman had gone before".

But she reportedly struggled with drug addiction for years.

"There's a misconception out there in the media that I've become this monster," she told Vice last year. "In the meantime, I'm just trying to get a job and live my life."

Tributes have poured in from the wrestling world on social media.