National Theatre, Louis A. Lotito, managing director, Fred Coe and Arthur Cantor present Dane Clark, Margaret O'Brien in "A Thousand Clowns," the hit romantic comedy by Herb Gardner, also starring Barry Gordon, with Marc London, Conrad Fowkes [i. e. Conard Fowkes], and Paul E. Richards, directed by Fred Coe, scenery designed and lighted by George Jenkins, costumes by Ruth Morley.