Born in Dublin on 7 November 1751, John was the fourth son of Noah Hickey, a confectioner in Capel Street, and his wife Anne.
His older brothers included the artist Thomas Hickey.
In 1778 he won the Royal Academy Gold Medal for his sculpture Slaughter of the Innocents.
[1] Edmund Burke was enthusiastic in promoting his work to create a statue of Henry Grattan in Dublin.
He died whilst walking on Oxford Street in London on 12 January 1795.