Joanna Mary Boyce (7 December 1831 – 15 July 1861) 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.