Jean Hagen married actor Tom Seidel (who originated the role of Dr. Sanderson in the play Harvey) on June 12, 1947, in Brentwood, California. The couple had two children, Christine Patricia Seidel and Aric Phillip Seidel. According to Lorraine LoBianco's authoritative biography, Seidel, in his attempt to stop his wife from drinking, divorced her and gained custody of the children. It did not work; Hagen's alcoholism only worsened, finally becoming so severe by 1968 that she was hospitalized and lapsed into a coma at UCLA Medical Center. She managed to survive the ordeal and her daughter Christine said that after she emerged from the coma, Hagen never drank again.