Elfrid: or The Fair Inconstant, generally shortened to Elfrid, is a 1710 tragedy by the British writer Aaron Hill. Hill wrote the work in less than a fortnight. Set in Saxon England it featured Barton Booth as Athelwold, Charles Powell as King Edgar and Lucretia Bradshaw as Elfrid. Concerned about the play's modest reception, Hill wrote an afterpiece entitled The Walking Statue which proved to be more popular than the main play, and was revived numerous times.