Actor Jeff Conaway is struggling to stay alive. The actor slipped into a coma after an apparent drug overdose and has yet to regain consciousness. Friends like "Celebrity Rehab" costar Mackenzie Phillips are rallying for the actor, best known for playing Kenickie in the movie "Grease" and Danny Zuko in the Broadway production. She recently tweeted, "all say a prayer (or whatever works 4 you) for Jeff Conaway tonight." The 60-year-old, who has a history of substance abuse, is unconscious and hospitalized at Encino Hospital Medical Center.
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