‘Welcome Back Kotter”s Horshack, Ron Palillo, is Dead

Ron Palillo, the actor who played class clown Arnold Horshack on the popular 1970s sitcom Welcome Back, Kotter, died Tuesday at the age of 63. He died of a heart attack, according to various media reports.

The actor, a native of Connecticut, was also a noted stage actor and playwright, while also accumulating numerous credits as a voice-over actor and making occasional TV and film appearances as an adult.

Palillo is survived by Joseph Gramm, his partner of more than 40 years.