Mary Anne à Beckett (29 April 1815 – 11 December 1863) was an English composer, primarily known for opera.
She was the wife of the writer Gilbert à Beckett, who provided the libretti for two of her operas.
Their children included the writers Gilbert Arthur à Beckett and Arthur William à Beckett.
Her theatrical connections included her brother, the actor and producer impresario Augustus Glossop Harris, and his eldest son, also an impresario, Sir Augustus Harris.