LOS ANGELES (AP) -- Jeff Conaway's manager says the former star of "Taxi" and "Grease" is in a coma following a drug overdose, possibly from pain pills.
Manager Phil Brock says the 60-year-old actor was found unconscious on May 11. He is hospitalized in critical condition.
RELATED: 15 celebrity rehab repeat offenders
Brock says Conaway is in a coma in an Encino, Calif., hospital and his recovery is uncertain. The name of the hospital was not disclosed.
"He is in a coma and unresponsive at this time," his manager told E! News. "He turned his head two days ago, but nothing since."
RELATED: Learn all about 'Taxi' on MSN
The actor is surrounded by friends and family, who have been anxiously awaiting an update from doctors, Brock said.
As part of the reality show "Celebrity Rehab" in 2008, Conaway discussed his addiction to drugs and alcohol.
His manager described Conaway as a "gentle soul," but one who has been unable to "exorcise his demons."
Conaway appeared in the 1978 movie musical "Grease," and starred in the TV series "Babylon 5."
RELATED: See what your favorite celebrities are up to this week
It's been 20 years since "Jurassic Park" came out. See what the cast of the movie is up to these days.
From Benji Madden and Cameron Diaz to Mariah Carey and Nick Cannon, take a look at some of Hollywood's strangest couples.
Check out Jessica Alba, Reese Witherspoon, and more stars who recycle their wardrobes.
Check out some of January Jones' most retro wardrobe choices from over the years.
From Reese Witherspoon to Justin Timberlake, see some of the hottest stars from the south.
See how Angelina Jolie's looks have changed over the years.
© 2014 Microsoft