Lady Harriet Cumnor Rosamund Pike Lady Harriet, the youngest daughter of Lord and Lady Cumnor, takes an interest in Molly's welfare when her former governess, Mrs. Kirkpatrick, becomes Molly's stepmother. Later, when Molly becomes the subject of scurrilous town rumors while acting on Cynthia's behalf, Lady Harriet comes to the rescue by taking up the cause of her honor. Rosamund Pike is a British television actress whose credits include performances as Fanny in the BBC's Love in A Cold Climate and as Celia in ExxonMobil Masterpiece Theatre's A Rather English Marriage.