She was the daughter of William Pleydell-Bouverie, 3rd Earl of Radnor and Judith Anne St. John-Mildmay.
She married Sir James Wilde in 1860, becoming Baroness Penzance on her husband's elevation to the peerage in 1869.
The couple resided at Eashing Park, Godalming.
One of his rose cultivars is named "Lady Penzance" in her honour.
This biography of a baron or baroness in the Peerage of Great Britain (1707–1800) is a stub.