Betrothal in a Monastery (original Russian title Обручение в монастыре; Obrucheniye v monastïre), Op. 86 is an opera by Sergei Prokofiev, his sixth with an opus number. The libretto, in Russian, was by the composer and Mira Mendelson (his companion in later life), after Richard Brinsley Sheridan's ballad opera libretto for Thomas Linley the younger's The Duenna.

Date of composition 1950
Type Symphony
Catalogue Op. 123
Approx. duration 20 minutes
Instruments Orchestra
Autotranslations beta Sergueï Prokofiev: Summer Night, Suite from Betrothal in a Monastery, Op. 123
Sergej Sergeevič Prokof'ev: Summer Night, Suite from Betrothal in a Monastery, Op. 123
Sergei Sergejewitsch Prokofjew: Summer Night, Suite from Betrothal in a Monastery, Op. 123