Jeff Conaway, Grease Star, in Coma After Overdose and Possible Suicide Attempt

Grease star Jeff Conaway, who has battled a long-time addiction to alcohol and drugs, is in a deep coma after overdosing on pain pills a week ago.

A source said the overdose was a suicide attempt.

Conaway’s manager, Phil Brock, said the actor was found unconscious on the floor of his Encino home May 11. In short, it doesn't look promising.

“A friend went to look for him because he wasn’t responding to messages,” Brock said. “We hope and pray, but doctors aren’t optimistic."

"These could be his final moments. He slightly moved his head three days ago but since, there’s been no sign he’ll recover.”

The actor is still recovering from injuries he suffered last year in a near-fatal fall that caused a brain hemorrhage, neck and hip fractures.

The 60-year-old actor appeared on Celebrity Rehab in 2008.

Also recently, Conaway had been battling his ex-fiancée, Vikki Lizzi, in a Los Angeles court. He was accusing her of injecting him with painkillers and planting cocaine in the LA home they shared before attempting to orchestrate a police bust.

Lizzi, meanwhile, claimed he punched her while she was driving and threatened to kill her. She likened his addiction to that of Michael Jackson.

"He doesn't admit he has any kind of problem with the pain meds but in fact it's the same situation that Michael Jackson was in,” Lizzi said in a recent interview. “He's gonna to be dead very soon if he doesn't get help."

Brock said Lizzi is banned from seeing Conaway at the hospital. He’s attended to by one of his only family members, his sister.