Marguerite Antonia Radclyffe Hall (12 August 1880 – 7 October 1943) was an English poet and author, best known for the novel The Well of Loneliness, a groundbreaking work in lesbian literature. In adulthood, Hall often went by the name John, rather than Marguerite. In the drawing rooms of Edwardian society, Marguerite made a small name as a poet and librettist.

In 1907, she met a middle-aged fashionable singer, Mrs. Mabel Batten, known as 'Ladye', who introduced her to influential people. Batten and Radclyffe Hall entered into a long-term relationship. Before Batten died in 1916, Radclyffe Hall, known in private as 'John', had taken up with the second love of her life, Una, Lady Troubridge, who gave up her own creative aspirations.