Ann Morgan Guilbert, sometimes credited as Ann Guilbert, was an American television and film actress and comedian who portrayed a number of roles from the 1950s on, most notably as Millie Helper in 61 episodes of the early 1960s sitcom The Dick Van Dyke Show, and later Yetta Rosenberg, Fran Fine's doddering grandmother, in 56 episodes of the 1990s sitcom The Nanny.

The Dick Van Dyke Show is an American sitcom created by Carl Reiner that initially aired on CBS from October 3, 1961, to June 1, 1966, with a total of 158 half-hour episodes spanning five seasons. It was produced by Calvada Productions in association with the CBS Television Network, and was shot at Desilu Studios. Other producers included Bill Persky and Sam Denoff. The music for the show's theme song was written by Earle Hagen.