Mary Weir, known as Molly Weir (17 March 1910 – 28 November 2004) was a Scottish stage actress, most notable for her role as the long-running (1977–1984) character Hazel the McWitch in the BBC TV series Rentaghost. She was the sister of naturalist and broadcaster Tom Weir.Born in Glasgow and brought up in the Springburn area of the city, Weir began in amateur dramatics. In her early professional career, she was a well-known radio actress, featuring in many comedy shows, such as ITMA.