Welcome Back, Kotter Actor Ron Palillo Dies

Ron Palillo, the boyish actor who played Arnold Horshack, the remedial-class loser on Welcome Back, Kotter, died Tuesday morning at his home near Palm Beach, Fla., TMZ reports. He was 63.

He suffered an apparent heart attack and was found by his longtime companion, Joseph Gramm, according to the report. Rushed to the hospital, Palillo, a heavy smoker, was pronounced dead upon arrival.