Mary Kelly was born in Dublin in 1957. She gained a BMus from UCD in 1978. She studied composition with James Wilson (Dublin), Robert Saxton (London) and David Dramm (Amsterdam, where she was living at the time). She attended composition workshops at Dartington Hall in Devon and at Centre Acanthes in Aix- en-Provence.
Her output includes chamber, choral and solo instrumental music. Her music has been performed and broadcast in many European countries, in Russia and in the USA. Her music appears on the DIT syllabus and also that of the Guildhall School of Music in London.
Mary is also a choral conductor and has been director of many school and amateur choirs. She sings with the Goethe-Institut choir.