Fiona Walker (born 24 May 1944) is an English actress, known for numerous theatre and television roles between the 1960s and 1990s.Her best remembered TV part is probably the role of Agrippina in the BBC adaptation of I, Claudius (1976), directed by Herbert Wise. She was an acidic Mrs Elton in BBC2's 1972 adaptation of Jane Austen's Emma and played the ill-fated Stella Mawson in Anglia's first P. D. James' adaptation, Death of an Expert Witness (1983), also directed by Wise.