Cathy Wayne was the stage name of Australian entertainer Catherine Anne Warnes (7 December 1949 – 20 July 1969) who was killed during the Vietnam War by United States Marine Sergeant James Wayne Killen. Wayne had just finished a song for US Marines at a Non-commissioned officer's club near Da Nang in South Vietnam. Killen was convicted of the unpremeditated murder of Wayne; at his court-martial it was alleged that he was aiming for his commanding officer, Major Roger E. Simmons. Wayne had intended to use money earned from her performances in Vietnam to revive her recording career; and to marry her fiancé, Clive Cavanagh, who was the drummer for her performance troupe, Sweethearts on Parade. Wayne was the first Australian woman killed during the Vietnam War.