TMZ reports Palillo had appeared to be in good health but was a heavy smoker. He was reportedly found by his partner of many years Joseph Gramm around 4 a.m. Tuesday morning.

TMZ reports that Palillo was found by his partner of many years, Joseph Gramm, around 4:00 am. Gramm called an ambulance, and Palillo was rushed to the hospital, where he was pronounced dead, TMZ ...

Most recently, Palillo taught acting classes at the Palm Springs-based G-Star School of the Arts. According to The Palm Beach Post, Palillo is survived by Joseph Gramm, his partner of 41 years.

Stacy Sacco, Palillo's friend, said Palillo passed away suddenly at 4:30 a.m. Born April 2, 1949 in Cheshire, Conn., Palillo is survived by his partner of 41 years, Joseph Gramm, a retired actor.

Palillo’s death also served a quiet coming-out for the actor, who was survived by his longtime partner Joseph Gramm.

Ron Palillo, best known as mouthy classroom goofball Arnold Horshack on the 1970s TV series “Welcome Back, Kotter,” died Aug. 14 at his home in Palm Beach Gardens, Fla. He was 63.

Palillo’s death also served as a quiet coming-out for the actor, who was survived by his longtime partner Joseph Gramm.

Actor Ron Palillo, who played Arnold Horshack on the ’70s sitcom “Welcome Back Kotter,” died Tuesday morning in West Palm Beach, Fla. He was 63. Long-time friend Stacy Stacco said… ...

Palillo’s long-time companion, retired actor Joseph Gramm, tried to revived him and called paramedics. “It’s a sad day, [63] is too young,” Stander said.

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.