'Grease' star Jeff Conaway is fighting for his life in a deep coma after taking a drug overdose. 

The 60-year-old actor, who played T-Bird Kenickie in the famous musical, has battled a long drug and alcohol addiction and his condition at the moment is critical.

His manager, Kathryn Boole explained the situation to Mail Online:

"The doctors are not optimistic and he is fighting for life right now."

"We're hoping he will pull through, but he is still in a coma."

No further information has been given at this time, but you can watch Conaway talk about his health here: