Transformations is a chamber opera in two acts by the American composer Conrad Susa with a libretto of ten poems by Anne Sexton from her 1971 book Transformations, a collection of confessional poetry based on stories by the Brothers Grimm. Commissioned by Minnesota Opera, the work, which is described by its composer as "An Entertainment in 2 Acts", had its world premiere on 5 May 1973 at the Cedar Village Theater in Minneapolis, Minnesota. Anne Sexton, who had worked closely with Susa on the libretto, was in the audience. It went on to become one of the most frequently performed operas by an American composer with its chamber opera format of eight singers and an instrumental ensemble of eight musicians making it particularly popular with smaller opera companies and conservatories. The 2006 revival production of Transformations at the Wexford Opera Festival won The Irish Times Theatre Award for Best Opera Production.