Rupert Peacock began his singing career at age 8 as a treble in the world-renowned King’s College Choir in Cambridge, U.K. As a child, he toured internationally, sang daily services and thrice performed the famous solo “Once in Royal David City” on Christmas Eve for television and radio audiences of several hundred million. With King’s he can be heard on recordings of Mozart’s Requiem, Fauré’s Requiem, choral music by Benjamin Britten, Christmas carols and English hymn anthems.

Peacock studied at Charterhouse School in Surrey (2014–19) with a music scholarship before serving as a deputy lay clerk of Durham Cathedral. In 2024, he graduated from Princeton University with a BA in Music, a certificate in vocal consort performance and as the recipient of the Isidore and Helen Sacks Memorial Prize, which recognizes “exceptional contributions to the artistic life of the Music Department.” For his senior thesis he conducted research in the archives of Ely Cathedral; the thesis presents a newly discovered piece of 16th-century English choral music. At Princeton, Peacock sang in Decem, the University Glee Club and Chamber Choir, and the Aquinas Institute Schola Cantorum. From 2022 to 2024 he served as director of the Princeton Footnotes.

Recently Peacock has sung with Ensemble Altera, Oxford Voices, Fifth Avenue Presbyterian Church and the Saint Thomas Choir of Men and Boys in New York City. This fall he is embarking on a master’s degree program in choral conducting at the University of Cincinnati College-Conservatory of Music.