Diana Weston (born 13 November 1953) is a Canadian-British actress who has been on British television since 1975. She is a grandchild of Charles Basil Price. Weston's first role was in a 1975 episode of Thriller, and parts in Raffles, The Sweeney, The Professionals, Agony, Shoestring and Bless Me, Father soon followed. She also appeared in the video for the 1984 Ultravox single Dancing with Tears in My Eyes. Since the late 1980s, she has appeared in The New Statesman, Boon, A Bit of a Do, About Face, Nightingales, Jonathan Creek, Casualty, Emmerdale, My Family, New Tricks and a main role in the 2000 sitcom Pay and Display.

However, it is for the role of Caroline in the sitcom The Upper Hand that she is best known, starring alongside Joe McGann and Honor Blackman, with the show being produced for ITV from 1990 to 1996.