After working at the William Morris Agency, Music Corporation of America, and Sam Jaffe talent agencies she went to work for Foote, Cone & Belding advertising agency as a secretary. Brown became well-known for her writing skills and moved her to the copywriting department where she advanced rapidly to become one of the nation's highest paid ad copywriters in the early 1960s. In 1959 she married David Brown, who later became the producer of "Jaws", "The Sting", "Cocoon", "Driving Miss Daisy", and other motion pictures.