The older daughter of a theater-loving mother (who would follow her two children to NYC and found the Thirteenth Street Repertory Company), Jenny O'Hara got her first big break in the touring company for "Brecht on Brecht," appearing with the legendary Lotte Lenya. She made her Broadway debut as one of Dylan Thomas' lovers in the biographical play "Dylan" and her Broadway singing debut in "The Fig Leaves Are Falling," directed by George Abbott, before succeeding younger sister Jill in the role of Fran Kubelik in "Promises, Promises." She also played Sylvie in the female version of Neil Simon's "The Odd Couple" and acted in a revival of Eugene O'Neill's "The Iceman Cometh," among her other Broadway productions.