'Grease' actor Jeff Conaway has died

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Zack Allan has gone on to the place where no shadows fall...

Los Angeles (CNN) -- Actor Jeff Conaway, who was in the TV series "Taxi" and the movie "Grease," died Friday morning, his manager said.

While pneumonia was the cause of death, the doctor who treated him for drug addiction for years says it was his dependence on prescription painkillers that eventually cost him his life.

"Jeff was a severe, severe opiate addict with chronic pain, one of the most serious and dangerous combination of problems you could possibly interact with," Dr. Drew Pinsky said during a taping for Friday night's "Dr. Drew" on HLN.

Of course, being younger I remember him most from Babylon 5.

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