She was the daughter of Betty Strachan (Spottiswoode) and Gerald Edward Victor Crutchley. Among her paternal great-great-grandfathers were Thomas Coke, 1st Earl of Leicester, and Thomas Egerton, 2nd Earl of Wilton.
Had two children by her second husband, actor Peter Ashmore: Jonathan Felix (born April 16, 1948) and Catherine (born June 12, 1952).