Helen Cresswell (11 July 1934 – 26 September 2005) was an English television scriptwriter and author of more than 100 children's books, best known for comedy and supernatural fiction. Her most popular book series, Lizzie Dripping and The Bagthorpe Saga, were also the bases for television series.
Cresswell's TV work included adaptation of her own books for television movies and series: Lizzie Dripping (two series, 1973–75), The Secret World of Polly Flint (1987), and Moondial (1988). Works by others that she adapted for TV include The Haunted School, Five Children and It (1991), The Phoenix and the Carpet, The Famous Five (1995–96), and The Demon Headmaster (1996–98).
Cresswell was born in Kirkby-in-Ashfield, Nottinghamshire. Her mother arranged Greek-language instruction for Helen at age 12, when she was hospitalized one year with spinal problems. She was educated at Nottingham High School for Girls, and at King's College London, where she earned a degree in English literature.
Cresswell and her childhood sweetheart Brian Rowe (married 1962, dissolved 1995) had two children, Caroline Rowe (born 1963) and Candy Rowe (born 1971) and two grandchildren, Ellie Staves (born 1996) and Lucy Staves (born 1999).
On 26 September 2005 Helen Cresswell died peacefully in her home in Eakring, Nottinghamshire, aged 71, from ovarian cancer.