He played Lou Grant on The Mary Tyler Moore Show, and gained prominence as a political activist. He also became the president of the Screen Actors Guild.
He was the voice of Carl Frederickson in Pixar's Up.
He starred in The Mary Tyler Moore Show.
He attended the University of Chicago and served in the U.S. Signal Corps.
He married Nancy Sykes in 1959, and the couple divorced in 1988 after having three children together.