John William Warner, KBE (born February 18, 1927) is an American Republican politician who served as Secretary of the Navy from 1972 to 1974 and as a five-term United States Senator from Virginia from January 2, 1979, to January 3, 2009. He did not seek reelection in 2008. Warner was once married to actress Elizabeth Taylor. He is a veteran of World War II, and one of only five serving in the Senate at the time of his retirement.

John William Warner KBE was born on February 18, 1927 to John W. and Martha Budd Warner and grew up in Washington, D.C., where he attended the elite St. Albans School, but he graduated from Woodrow Wilson High School (A D.C. Public School) in February 1945.

He enlisted in the United States Navy during World War II in January 1945, shortly before his 18th birthday. He served until the following year, leaving as a Petty Officer 3rd Class. He went to college at Washington and Lee University, where he was a member of Beta Theta Pi, graduating in 1949; he then entered the University of Virginia Law School.