Katy Kelly studied for her Graduate Performance Diploma in Opera at the Boston Conservatory, and for her MMus in Performance from the Conservatory of Music and Drama in Dublin under Anne Marie O'Sullivan. She qualified as a Regional Finalist at the Metropolitan Opera New England National Council Awards (USA), and has won many prizes for her singing in Europe, including the IAWS John McCormack Bursary. Katy has represented Ireland in many premier European competitions including Belvedere International Singing Competition (Vienna), the IVC (Holland), and the Stuart Burrows (Wales), for which she received the runners up prize. She has performed in Carnegie Hall with the Thomas Moore Festival, and she is a regular performer at the National Concert Hall, Dublin.

Recent operatic performances include “Donna Anna” in Mozart’s Don Giovanni, “Countess” in Le Nozze di Figaro, Königin der Nacht in Die Zauberflöte, and Le Feu/Le Rossignol in Ravel’s L’enfant et les Sortilèges. She performed excerpts from two new operas; A Brief History of Root Vegetaables (“Trophy”), and The Inspector (“Bobachina”) for the 2011 Opera America Conference in Boston. She has also performed the roles of “Euridice” in Gluck’s Orfeo ed Euridice, “Musetta” in Puccini’s La Boheme, and “Sandman” in Humperdinck’s Hansel & Gretel. She toured Germany with the Schleswig-Holstein Music Festival performing Faure’s Requiem, Vivaldi’s Gloria and Beethoven’s Fantasie. Other solo performances include Poulenc's Gloria, Rutter's Magnificat, Bach's St John Passion, Beethoven's Mass in C, Bach's Magnificat, Dvořák's Stabat Mater, Mozart's Requiem & Vesperae Solennes de Confessore, Haydn's The Creation & Nelson Mass, Handel’s Messiah, Saint-Saens’ Oratorio de Noel, and Mendelssohn’s A Midsummer Night’s Dream & Elijah.

Her recordings include six songs on the first full catalogue of Moore's melodies in 2009, and she was the featured soloist on the AIB Choral Society CD, "Simply Christmas". She recorded the “Königin der Nacht” arias for the RTÉ television programme "The Symphony Sessions-the Sopranos. She was featured on the RTE1 TV programme “Abhainn”. Her CD, "A Few of My Favourite Sings" is available from her website and from the iTunes Store. Since Lockdown, she has been part of many online and studio releases, her most notable with Glories Streaming, which has been touring since December 2020. Their follow up tour will commence December 2021 and details can be found on her website. This is her 3rd appearance at IIMS since Live Music has recommenced.