Kirk was born in Sydney, New South Wales, Australia on 4 July 1958. Known primarily as co-writer, guitairst saxophonist & percussionist with Australian new Wave outfit INXS from 1980-1997 to the fore.
Has one daughter, April , from his first wife, Karen.
Ex-wife Deni Hines is the daughter of famous singer, Marcia Hines, and also has a successful singing career herself.