Kate Williams (born in 1941 in London, England, UK) is an English actress from London who trained at London's East 15 Acting School.

She remains best known for two television roles: Joan Booth in the 1970s sitcom Love Thy Neighbour and Audrey Withey in the crime drama Widows (1983). She reprised the role of Audrey in Widows 2 (1985), and for the "ten years later" sequel She's Out (1995), the only member of the original Widows cast (aside from Ann Mitchell as Dolly Rawlins) to do so.

She also starred in the 1973 film version of Love Thy Neighbour. Other film credits include: Holiday on the Buses, Poor Cow (1967), and Quadrophenia. She played Mrs Perkins in Melody (1971 film)

Guest roles on TV include: Dixon of Dock Green, On the Buses, Please Sir!, Minder, The Gentle Touch, Just Good Friends, C.A.T.S. Eyes, Only Fools and Horses, May to December, Murder Most Horrid, Lovejoy, Born and Bred (1978-80), and The Bill.

More recently, she was a regular cast member of the five soap opera Family Affairs as Myra Costello and also appeared in the BBC's popular soap opera EastEnders in September 2006 playing Liz Turner, a role she is currently reviving due on screens in summer 2009.