Joanna Mary Boyce was a British painter associated with the Pre-Raphaelite Brotherhood. She is also known by her married name as Mrs. H.T. Wells, or as Joanna Mary Wells. She produced multiple works with historical themes, as well as portraits and sketches, and authored art criticism responding to her contemporaries. She was the sister of Pre-Raphaelite watercolourist George Price Boyce.

The Pre-Raphaelite Brotherhood was a group of English painters, poets, and art critics, founded in 1848 by William Holman Hunt, John Everett Millais, Dante Gabriel Rossetti, William Michael Rossetti, James Collinson, Frederic George Stephens and Thomas Woolner who formed a seven-member "Brotherhood" partly modelled on the Nazarene movement. The Brotherhood was only ever a loose association and their principles were shared by other artists of the time, including Ford Madox Brown, Arthur Hughes and Marie Spartali Stillman. Later followers of the principles of the Brotherhood included Edward Burne-Jones, William Morris and John William Waterhouse.