Sheila Cameron Hancock (born 22 February 1933) is a British actress and author. She works mostly on stage. She won a Laurence Olivier Award for Cabaret. For her role in Entertaining Mr Sloane (1966) she was nominated for a Tony Award. She also had roles in Sweeney Todd (1980), The Winter's Tale (1982), Prin (1989) and Sister Act (2010). She appeared in the movie The Boy in the Striped Pyjamas (2008).
Hancock was born in Blackgang on the Isle of Wight, England. Her first husband, Alec Ross, died from oesophageal cancer in 1971. She later married actor John Thaw in 1973. He also died from oesophageal cancer in 2002.
Hancock is a breast cancer survivor.