Nedinia Hutton Rumbough Robertson Hartley (b. 9 December 1925) is an American actress known as Dina Merrill. The daughter of Wall Street wizard Edward F. Hutton and Post cereal heiress Marjorie Merriweather Post, her first film was Desk Set (1957), in which she played Sylvia Blair, one of the researchers whose supervisor was Bunny Watson (Katharine Hepburn). Her second husband (of three) was the American actor Cliff Robertson (married 1966, divorced 1986).