Born in Kuala Lampur to British parents, Seagrove trained at the Bristol Old Vic Theatre School in London. She has appeared on the British stage in "Bedroom Farce" (1979) and the title roles of "Hedda Gabler" (1983) and "Jane Eyre" (1986). On the small screen, Seagrove first caught the attention of US audiences as the younger version of Deborah Kerr's character in the syndicated miniseries "A Woman of Substance" (1984).