Williams' act was, apparently, not an act. The singer's unflappable manner on television and in concert was mirrored offstage.
"I guess I've never really been aggressive, although almost everybody else in show business fights and gouges and knees to get where they want to be," he once said. "My trouble is, I'm not constructed temperamentally along those lines."
His wholesome image endured one jarring interlude.
In 1976, his ex-wife, former Las Vegas showgirl Claudine Longet, shot and killed her lover, skiing champion Spider Sabich. The Rolling Stones mocked the tragedy in "Claudine," a song so pitiless that it wasn't released until decades later. Longet, who said it was an accident, spent only a week in jail. Williams stood by her. He escorted her to the courthouse, testified on her behalf and provided support for her and their children, Noelle, Christian and Robert.
Also in the 1970s, Williams was seen frequently in the company of Ethel Kennedy, Robert Kennedy's widow. The singer denied any romantic involvement.
He was born Howard Andrew Williams in Wall Lake, Iowa, on Dec. 3, 1927. In his memoir, Williams remembered himself as a shy boy who concealed his insecurity "behind a veneer of cheek and self-confidence."
Williams began performing with his older brothers Dick, Bob and Don in the local Presbyterian church choir. Their father, postal worker and insurance man Jay Emerson Williams, was the choirmaster and the force behind his children's career.
When Andy was 8, Williams' father arranged for the kids to have an audition on Des Moines radio station WHO's Iowa Barn Dance. They were initially turned down, but Jay Emerson Williams and the young quartet kept returning, and they were finally accepted. The show attracted attention from Chicago, Cincinnati and Hollywood. Another star at WHO was a young sportscaster named Ronald Reagan, who would later praise Williams as a "national treasure."