In 1975, Palillo was cast as Arnold Horshack, one of the misfit "sweathogs" in the high school sitcom Welcome Back, Kotter, whose antics made him one of the standout characters of the series.

Ron was given a lead role in a musical special, "The Last Sweet Days of Isaac", on television. After Isaac, he once again went on tour and appeared with Mickey Rooney in "A Midsummer Night's …

Aug 14, 2012 · 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 …

Aug 14, 2012 · Actor Ron Palillo, best known as Arnold Horshack. The Palm Beach Post writes that a friend of Palillo's, Stacy Sacco, says he passed away this morning. Palillo's agent, Scott Stander, …

Aug 15, 2012 · Palillo played Arnold Horshack on the ’70s sitcom Welcome Back, Kotter, which for about two years was the not-miss comedy of my youth along with Happy Days and Laverne & Shirley.

Aug 14, 2012 · Horshack was the nasally teen who yelped, "Oooh, ooh," and shot his hand skyward whenever Kotter posed a question.

Dec 3, 2025 · WEST PALM BEACH, Florida – (AP) Ron Palillo, the actor best known as the nerdy high school student Arnold Horshack on the 1970s sitcom “Welcome Back, Kotter,” died Tuesday in Palm …

Aug 15, 2012 · Mr. Palillo portrayed the goofy high school underachiever Arnold Horshack in the hit 1970s sitcom “Welcome Back, Kotter.”

The show was not received well by critics and lasted for five episodes on ABC. Talk arose of developing a spin-off built around the Horshack character and his family, Rich Man, Poor Man; Horshack!, but it …

Aug 14, 2012 · As sweet as he was goofy, Palillo created the annoying-yet-endearing class clown Arnold Horshack, one of the good-hearted, underachieving Sweathogs trusted to the care of wisecracking …