Chyna was 45-years-old.
A statement was posted to Chyna's official Twitter account confirming the death ... saying, "It is with deep sadness to inform you today that we lost a true icon, a real life superhero."
"She will live forever in the memories of her millions of fans and all of us that loved her."
Laurer was discovered at her home, according to ProWrestlingSheet.com.
Chyna was a game changer during her stint with the WWE -- famously teaming up with Triple H to become one of the original members of Degeneration X.
Chyna went on to pose for Playboy before transitioning to reality TV. She appeared on "The Surreal Life" in 2005.
Later, Chyna got into porn ... releasing 6 films from 2004 to 2013.
She later went to Japan to teach English.Chyna posted a video to her YouTube page earlier this week -- she looked like she was struggling.