Ron Palillo Dead at 63 — Horshack from ‘Welcome Back, Kotter’ Dies from Heart Attack

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Ron Palillo — the actor who played Horshack on “Welcome Back, Kotter” — died this morning at his home near Palm Beach from an apparent heart attack … this according to someone close to the actor.

We”re told Palillo was found by his partner of many years Joseph Gramm around 4:00 AM. Gramm called an ambulance and Palillo was rushed to hospital, where he was pronounced dead.

We”re told the heart attack was very unexpected. Polillo was 63.

Palillo was known for calling out, “Ooh ooh ooh, Mr. Kotter” as one of the Sweathogs on the show … which he appeared on with John Travolta from 1975 to 1979. 

After Kotter, Palillo appeared in “Laverne and Shirley” and voiced a character on the Disney cartoon, “Darkwing Duck.”

Palillo”s “Kotter” co-star Robert Hegyes — who played Epstein — passed away earlier this year after suffering a heart attack.