Well known for her portrayal of Rosie Miller on the popular British soap opera EastEnders, she is also notable for her appearances on The Bill, Only Fools and Horses, Yes Minister, and Casualty.
Early in her career, she appeared in nine episodes of the British sitcom Bachelor Father.
She voiced the character of Clare France on the BBC Radio program After Henry.
Her younger sister, Nicola Cowper, and her twin sister, Jackie Cowper, also pursued acting careers. Her marriage to
She and Edward Woodward were both in the cast of the 1973 horror movie The Wicker Man.