Ron Palillo: 1949-2012

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Actor Ron Palillo arrives at the 6th annual "TV Land Awards" held at Barker Hangar on June 8, 2008, in Santa Monica, Calif.

Palillo, who played Arnold Horshack on the 1970s TV series "Welcome Back, Kotter," died on Aug. 14, 2012. He was 63.

From left to right, Lawrence Hilton Jacobs as Freddy "Boom-Boom" Washington, Ron Palillo as Arnold Horshack, John Travolta as Vinnie Barbarino, Robert Hegyes as Juan Epstein, and Gabe Kaplan as Gabe Kotter in scene from "Welcome Back, Kotter."

Actor Ron Palillo attends the ABC Television Network's 50th Anniversary Special at the Pantages Theatre on March 16, 2003, in Hollywood, Calif.

Actor Ron Palillo and actress Erin Moran attend the ABC Television Network's 50th Anniversary Special at the Pantages Theatre on March 16, 2003, in Hollywood, Calif.

Actor Ron Palillo arrives at the American Museum of the Moving Image Salute to John Travolta at the Waldorf Astoria Hotel on Dec. 5, 2004, in New York.

Actor Ron Palillo participates in the American Museum of the Moving Image Salute to John Travolta at the Waldorf Astoria Hotel on Dec. 5, 2004, in New York.

Actor Ron Palillo poses with George Lopez at the AOL and Warner Bros. Launch of In2TV at the Museum of TV & Radio on March 15, 2006, in Beverly Hills, Calif.

Actress Rita Mckenzie poses with Ron Palillo at the AOL and Warner Bros. Launch of In2TV at the Museum of TV & Radio on March 15, 2006, in Beverly Hills, Calif.

Actor Ron Palillo poses at Gotham Magazine's "Shop for a Cause" at Lord & Taylor on May 21, 2008, in New York.

Actor Ron Palillo, center, performs "Adelaide's Lament" during the 2009 Broadway Backwards at the American Airlines Theatre on Feb. 9, 2009, in New York.

From left to right, actors Michael Urie, Ron Palillo and Becki Newton attends the 2009 Broadway Backwards after party at the American Airlines Theatre on Feb. 9, 2009, in New York.