Lady Anne Mary Gabrielle Lambton (born 4 July 1954) is a British actress.

Lambton is a younger daughter of Antony Lambton (formerly 6th Earl of Durham) and his wife Bindy (née Blew-Jones). Her elder sister is Lucinda Lambton, a British writer, photographer and broadcaster. One of her first roles was as Linda in Sid and Nancy (1986), followed by Sidney Platts-Williams in Half Moon Street (1986) and as the sinister witch the 'Woman in Black' in the 1990 film, The Witches. More recent appearances include Brothers of the Head and Mrs. Henderson Presents (both 2005) and The Edge of Love (2008) as well as the reporter Gloria in Netflix’s second season of The Crown.