Matthew Perry, best known for his role on hit US sitcom Friends, has died of an apparent drowning at his home.
The actor was 54 years old.
A 911 call was received by Los Angeles Police, at 4.07pm local time (12.07am UK time).
The incident at the star's Pacific Palisades home in LA was treated as a water rescue.
There was no apparent foul play and no confirmed cause of death. An investigation is ongoing.
Perry launched to fame for his role on 1990s sitcom Friends, alongside Jennifer Aniston, Courteney Cox, Matt LeBlanc, Lisa Kudrow and David Schwimmer.
The hit show followed the close-knit group living in New York, with Perry playing Chandler Bing, who became known for his use of sarcastic one-liners.
The show ran for 10 seasons from 1994 to 2004.
Around a year ago, Perry embarked on a press tour for the release of his memoir Friends, Lovers, And The Big Terrible Thing: A Memoir.
He spoke about his battle with addiction - including a near-death experience in 2019 after his colon burst as a result of opioid use.
Born in Massachusetts, Perry was raised in Ottawa in Canada and moved to LA to pursue an acting career at the age of 15 - joining the cast of Friends at the age of 24.
He received one Emmy nomination for his role as Chandler, and a further two for appearances on political drama television series The West Wing.
Before acting, Perry was a top-ranked junior tennis player in Canada. He used to practice up to 10 hours a day, according to Tennis Canada.
