Born as Gwendoline Alexandra Nelson in Muswell Hill, London, she originally intended to be a singer, and made her West End musical debut in Tough at the Top at the Adelphi Theatre in July 1949. She went on to act in Eleanor Farjeon's The Silver Curlew at London's Arts Theatre (1949), And So To Bed at the New Theatre (1951), Oh, My Papa at the Garrick Theatre (1957), Virtue in Danger (1963), All in Love at The May Fair Theatre (1964), and Saved at the Royal Court Theatre (1965). In 1976 she appeared in a revival of Arnold Ridley's The Ghost Train at the Old Vic Theatre in London with Wilfrid Brambell, James Villiers, Geoffrey Davies, Allan Cuthbertson and Judy Buxton. In 1981 she acted in Rose by Andrew Davies at the Richmond Theatre in Surrey with Honor Blackman and Hilda Braid.
Her television appearances included Z-Cars (1962–72), No Hiding Place (1960–64), ITV Playhouse (1969-1980), Randall and Hopkirk (Deceased) (1970) (in the episode The Trouble with Women), Catweazle (1970–71), Callan (1972), Clochemerle (1972), Steptoe and Son (1974), Juliet Bravo (1981), Terry and June (1983), Shine on Harvey Moon (1984), Casualty (1988), Hill Street Blues (1989), and Ruth Rendell Mysteries (1989).
She acted in the films Ah, Wilderness! (1938), Laugh With Me (1938), The Teckman Mystery (1954), Tunes of Glory (1960), A Kind of Loving (1962), Stolen Hours (1963), Doctor Zhivago (1965), The Reckoning (1969), Staircase (1969), Say Hello to Yesterday (1971), Love Among the Ruins (1975), It Shouldn't Happen to a Vet (1976), The Last Remake of Beau Geste (1977), National Lampoon's European Vacation (1985) and 84 Charing Cross (1987).