The Duchess Of Duke Street is a BBC television drama series set in London between 1900 and 1925. It was created by John Hawkesworth, the former producer of the highly successful ITV period drama Upstairs, Downstairs and starred Gemma Jones as Louisa Trotter, the eponymous "Duchess" who works her way up from servant to renowned cook to proprietress of the upper-class Bentinck Hotel in Duke Street, Marylebone in London.

The story is loosely based on the real-life career of Rosa Lewis (née Ovenden), the "Duchess of Jermyn Street", who ran the Cavendish Hotel in London. When the show first aired, there were many people who still remembered her, as she lived until 1952. She was born in Leyton, Essex, to a watchmaker, and some of the family history can be traced through the census returns. However much remains obscure.

The programme lasted for two series totaling 31 episodes, shown between 1976 and 1977. It was nominated for an Emmy Award for Outstanding Limited Series in 1980.

Louisa Trotter works her way up from being a skivvy to being the Queen of cooks, cook to the King, and owner of the Bentinck Hotel. Her life and happenings among the guests and staff of the Hotel make up the 31 episodes. Written by Kathy Li