Born in Indiana and raised in Texas, Andrew Duggan attended Indiana University on a speech and drama scholarship. He was starred there in Maxwell Anderson's The Eve of St. Mark, which was being given a nonprofessional pre-Broadway tryout; on the basis of this performance, Duggan was cast in the professional Chicago company of the Anderson play. Before rehearsals could start, however, Duggan was drafted into the army. After wartime service, Duggan began his acting career all over again, working at his uncle's Indiana farm in-between Broadway and stock engagements. In Hollywood in the late 1950s, Duggan was co-starred in the Warner Bros. TV series Bourbon Street Beat and was featured in such films as The Bravados (1958), Seven Days in May (1964) and In Like Flint (1967). He also was starred on the 1962 TV sitcom Room for One More and the 1968 video western Lancer. Because of his marked resemblance to Dwight D. Eisenhower, Duggan was frequently cast as generals and U.S. presidents. Andrew Duggan's last screen appearance was in The Private Files of J. Edgar Hoover.