Judy Catherine Claire Parfitt (born 7 November 1935) is an English theatre, film, and television actress. She made her film debut in the 1950s, followed by a supporting role in the BBC television serial David Copperfield (1966). She also appeared as Queen Gertrude in Tony Richardson's 1969 film adaptation of Hamlet.

Later credits include Mildred Layton in the 1984 ITV television series The Jewel in the Crown, for which she received her first BAFTA award nomination; Lady Catherine de Bourgh in the 1980 television serial version of Pride and Prejudice; Vera Donovan in the 1995 film adaptation of Stephen King's Dolores Claiborne; and as Maria Thins in the 2003 film Girl with a Pearl Earring, for which she earned another BAFTA award nomination for Best Supporting Actress. She has been a cast member on the drama series Call the Midwife, playing Sister Monica Joan, since the show's launch in 2012.