Ellen Waller Borden Stevenson, (née Borden, December 14, 1907 – July 28, 1972),[1][2] was an American socialite who was the First Lady of Illinois in 1949, having been married to Adlai Stevenson II, who became Governor of Illinois that year. She was the mother of his three children, including Adlai Stevenson III, who became a U.S. Senator. She divorced her husband within a year of his election to the governorship, and was noted for thereafter occasionally commenting on his political activities, including his two unsuccessful campaigns for the presidency, with a characteristic acerbic wit.