Yvonne Kenny when she replaced, with only four days' notice, the soprano scheduled to sing in an Opera Rara concert performance of Donizetti's "Rosmonda d'Inghilterra" at the Queen Elizabeth Hall. It was a triumph and the virtually unknown Kenny became an overnight star. She made her debut at the Royal Opera House the following year, in the premiere of Hans Werner Henze's "We Come to the River", later singing in Handel operas such as: "Semele", "Alcina", "Giulio Cesare", and such Mozart operas as: "Idomeneo", "Mitridate, re di Ponto", "La clemenza di Tito", "The Abduction from the Seraglio", "The Magic Flute". She also
June Bronhill Merry Widow", "Orpheus in the Underworld", "Die Fledermaus" and "Rigoletto" at the Sydney Opera House in 1975. In 1976, she decided to move back to Australia permanently. In Australia she appeared in operas such as "Il Seraglio" ("Die Entführung aus dem Serail") and a Victoria State Opera production of Donnizetti's "Maria Stuarda" in July 1976, directed by Robin Lovejoy with a cast including Nance Grant conducted by Richard Divall. She played operetta roles such as Josephine ("H.M.S. Pinafore"), Phyllis ("Iolanthe") and Ruth ("The Pirates of Penzance"). She also had roles in "The Maid of the Mountains", "Call Me Madam", "A