From Wikipedia

Helen Maud Holt (5 October 1863 – 7 August 1937), professionally known as Mrs Beerbohm Tree and later Lady Tree, was an English actress. She was the wife of the actor Herbert Beerbohm Tree and the mother of Viola Tree, Felicity Tree and Iris Tree.

After early stage appearances beginning in 1883, Mrs Tree married and established a theatrical partnership with her husband, in which they appeared in revivals of classic plays and productions of new plays, first at the Theatre Royal, Haymarket and then at Her Majesty's Theatre. Her performances in serious roles were well received, but she was most celebrated for her work in comedy, from Shakespeare to new works by Wilde and others.

After her husband's death in 1917, Lady Tree continued to act steadily for almost two decades more until towards the end of her life, in plays and some films, making her last stage appearance in 1935.