Matthew Perry, one of the stars of the smash hit TV sitcom "Friends," was found dead at his home in Los Angeles on Saturday, U.S. media reported. He was 54.

First responders found Perry unconscious in a hot tub at his house and were unable to revive him, law enforcement sources told the Los Angeles Times.

"We responded at 4:10 pm. ... It is a death investigation for a male in his 50s," a Los Angeles Police Department spokesman said, without confirming the deceased's name.