LAS VEGAS (AP) - Charlie Callas, a versatile comedian and sidekick whose zany faces and antics made him a regular for more than four decades on television, in films and on casino stages, has died in Las Vegas. He was 83.A son, Mark Callas, tells The Associated Press that Callas died Thursday in a hospice. Clark County Coroner Mike Murphy says the death was from natural causes. Callas toured with Frank Sinatra and Tom Jones, and had a screen part with Jerry Lewis in "The Big Mouth" in 1967.His facial expressions and rapid-fire comedy also made Callas a favorite on the "Tonight Show" with Johnny Carson. He also worked with Mel Brooks and was the voice of Elliot in Disney's "Pete's Dragon."