John Paul Stevens (born April 20, 1920) served as an Associate Justice of the Supreme Court of the United States from December 19, 1975 until his retirement on June 29, 2010. At the time of his retirement, he was the oldest member of the Court and the third-longest serving justice in the Court's history. He was nominated by President Gerald Ford to replace the Court's longest-serving justice, William O. Douglas. Stevens is widely considered to have been on the liberal side of the Court. Stevens served with three Chief Justices (Warren E. Burger, William Rehnquist, and John G. Roberts).