So Long, Larry Bud

"Letterman" regular Calvert DeForest, who went from file clerk to late-night icon, has signed off. He was 85.

Calvert DeForest, the white-haired, bespectacled nebbish who gained cult status as the oddball Larry "Bud" Melman on David Letterman's late night television shows, has died after a long illness. The Brooklyn-born DeForest, who was 85, died Monday at a hospital on Long Island, Letterman's "Late Show" announced Wednesday.

He made dozens of appearances on Letterman's shows from 1982 through 2002, handling a variety of twisted duties: dueting with Sonny Bono on "I Got You, Babe," doing a Mary Tyler Moore impression during a visit to Minneapolis, handing out hot towels to arrivals at the Port Authority Bus Terminal.

"Everyone always wondered if Calvert was an actor playing a character, but in reality he was just himself -- a genuine, modest and nice man," Letterman said in a statement. "To our staff and to our viewers, he was a beloved and valued part of our show, and we will miss him."

The gnomish DeForest was working as a file clerk at a drug rehabilitation center when show producers, who had seen him in a New York University student's film, came calling. ...

"It was the greatest thing that had happened in my life," he once said of his first Letterman appearance.

"So long, suckers!" RIP.