Mary Benedict Cushing Astor Fosburgh (January 27, 1906 – November 4, 1978) was an American socialite, philanthropist and art collector.

"[1] Her two sisters, also prominent socialites – the Cushing Sisters were renowned in their time – were Betsey Maria Cushing (1908–1998), who was married to James Roosevelt II and later to John Hay Whitney, and Barbara Cushing (1915–1978),[2] who married Stanley Grafton Mortimer, Jr. and later William S.

She was also a major supporter of the American National Theater and Academy and the Henry Street Settlement.

It was Astor's second marriage, his first to Helen Dinsmore Huntington, ended in divorce, also in 1940.

[8] Together, they amassed a significant art collection known for its paintings, including works by Paul Cézanne, Winslow Homer, William Nicholson, Pierre-Auguste Renoir, Walter Sickert, and Pavel Tchelitchew.