Matthew John Reilly (born 2 July 1974) is an Australian action thriller writer. His novels are noted for their fast pace, twisting plots and intense action.
After graduating from Sydney's St Aloysius' College in 1992, Reilly studied Law at the University of New South Wales, where he was also a contributor to the student law society publication "Poetic Justice".
Reilly wrote his first book, Contest, at the age of 19 and self-published it in 1996. It was rejected by every major publisher in Australia, leading Reilly to self-publish 1000 copies using a bank loan. Reilly was discovered when a publisher from Pan Macmillan found a self-published copy of Contest in a bookstore. Reilly wrote his second book, Ice Station, while studying at the University of NSW.