Elizabeth "Elsie" Foster Cassatt Stewart (August 14, 1875 – May 31, 1931) was an American sportswoman and socialite.
[1] Cassatt was described as "a young woman whose every curve speaks of her athletic training and fine physical condition... a modern Diana: she rides, swims, shoots, and plays tennis.
[9] She loaned some of Mary Cassatt's paintings to a major exhibit held at the Pennsylvania Museum in 1927, curated by Louisine Havemeyer.
[10] Elsie Cassatt married stockbroker W. Plunket Stewart in 1902,[11][12] and divorced him in 1930; he soon remarried.
Her daughter Katherine Kelso Stewart married Eric Vicomte de Spoelberch, a Belgian pilot and athlete, in 1932.