Hylda Baker (born February 4, 1908 in Farnworth, Bolton; died May 1, 1986 in Epsom) was a Northern English comedy actress.
She was famous for her catchphrase She knows you know since the days of music hall. She is probably best known for her role in the ITV television series Nearest and Dearest (1968-1972). Hylda’s character Nellie Pledge (owner of a north of England pickle factory, Pledge's Purer Pickles), was ideally suited to her talents and she was cast opposite the comedian Jimmy Jewel. A theatrical version appeared in 1973 (produced by Hammer Films), and a near sequel (Not On Your Nellie (1973-1975), in which a similar character moved to London to take charge of her ailing father's pub) followed.
She also had parts in a number of films including Saturday Night and Sunday Morning, Up the Junction, and the Lional Bart version of Oliver!.

The Brown Cow - Fan site about the star of the series Not on your Nellie: news of programme showings, biography and history.