Lilly Mattock is a fictional character from the BBC soap opera EastEnders, played by Barbara Keogh from 5 November 1998 to 2 September 1999.

Lilly was a former hoofer with the Westwood Girls (a showgirl), performing throughout Europe and the Far East at the close of World War II.

[2] She arrives in Albert Square in 1998 when she moves into a flat with fellow senior-citizen Dot Cotton (June Brown) when both of their respective homes burn down.

Lilly is never one to let her age spoil her fun and she often gives the youngsters of Walford a run for their money by clubbing in e20, trouncing Huw Edwards (Richard Elis) and Lenny Wallace (Desune Coleman) at a game of poker and making an exhibition of herself in salsa classes.

Lilly works for Terry and Irene Raymond (Gavin Richards and Roberta Taylor) at the First Til' Last grocery store, and when coming home from one of her late shifts she is mugged by an armed youth.

[3] The character Lilly Mattock, played by Barbara Keogh, was introduced in November 1998 by the executive producer of EastEnders, Matthew Robinson.

[9] Lilly's backstory was revealed in her official biography on the BBC website, told from the character's perspective: Did I tell you that I used to be a dancer for the Westwood Girls?

In the storyline she has an argument with flatmate Dot Cotton after blurting out in The Queen Victoria public house that Mark Fowler (Todd Carty) is HIV positive.

A BBC insider told The People newspaper "[Dot and Lilly were] supposed to be two pensioners providing comedy scenes but June thought it was rubbish.