Selina Jane Cadell (born 12 August 1953, London) is an English actress. She is the younger sister of actor Simon Cadell and granddaughter of actress Jean Cadell.Cadell has been appearing on British television, film, and theatre over the last thirty years. She has taken on a wide range of supporting and leading roles. Recently, she has played Dorothy Crowther in The Amazing Mrs Pritchard; Mrs Tishell in Doc Martin; and the Dean Mieke Miedema in Lab Rats.