Antoinette Halloran is a graduate of the Victorian College of the Arts and has an Honours Degree in Music from the University of Melbourne. Since graduating, Antoinette has appeared in many productions ranging from opera to musical theatre and cabaret. Music theatre highlights include roles in The Phantom of the Opera, A Little Night Music, Masterclass, Forbidden Broadway, The Merry Widow and The Opera Burlesque.

For Oz Opera she has performed Mimi in La Bohème and the title role in The Ghost Wife at the Barbican in London. For Chamber Made Opera, she has performed roles in Motherland of the Foreign Son and Matricide - the Musical.

In 2005 Antoinette was the winner of the Acclaim Awards (Australian Puccini Foundation) which enabled her to study and perform the roles of Kate Pinkerton in Madama Butterfly and Prima Ancella in Turandot at the prestigious Torre Del Lago, Italy.

Roles for Opera Australia include Mimi in La Bohème, Despina in Cosi fan Tutte, Gianetta in The Gondoliers, Ellen in Lakmé and Josephine in H.M.S. Pinafore. She has sung Cio-Cio-San in Madama Butterfly and Donna Elvira in Don Giovanni, Pamina in The Magic Flute and Fiordiligi in Cosi Fan Tutte for Melbourne Opera. In 2006, Antoinette sang Fiordiligi for the inaugural season of Victorian Opera. She also featured as a guest judge and panelist on the ABC television series Operatunity Oz, and appears regularly on the hit ABC Television show Spicks and Specks.

In 2007, Antoinette sang the title role of Rusalka, Stella in A Streetcar Named Desire, Donna Elvira in Don Giovanni and Johanna in Sweeney Todd for Opera Australia. 2008 saw performances as Mimi for both Opera Australia and New Zealand Opera and Adina in L’Elisir d’Amore for Victorian Opera.

Concert work includes the Mozart Requiem with the Hong Kong Philharmonic, Carmina Burana with the Melbourne Chorale, El Nino with Sydney Philharmonia and Haydn’s Creation and Faure’s Requiem with the Royal Melbourne Philharmonic. She has appeared in concert with Elvis Costello and the Brodsky Quartet for the Sydney Festival. Antoinette has also been engaged as guest soloist with the Adelaide and Melbourne Symphony Orchestras and recently released Puccini Romance for ABC Classics with tenor Rosario La Spina and The Queensland Orchestra.

In 2009, Antoinette sang Cio-Cio-San and Stella for Opera Australia in Sydney and Melbourne, the role of Mimi in their Myer Music Bowl Performance and the title role in Tosca for Melbourne Opera. She appeared as soloist with the Melbourne, Tasmanian and Canberra Symphony Orchestras and in concert with Sydney Philharmonia.

In 2010, she sings the title role in The Merry Widow for Opera Queensland and Rosalinde in Die Fledermaus for Opera Australia.