Monica Mayhem (born 14 March, 1978 in Brisbane, Australia) is an Australian pornographic actress and exotic dancer and singer. Her band is Sweet Avenge.

Before adult films, Mayhem worked in Sydney and London, first in finance then as an exotic dancer. In 2002 she won the XRCO Award for Starlet of the Year.

Outside the adult business, she is a singer/guitarist in an all-girl metal band, Sweet Avenge.

In 2008, she appeared in a small role in the Sex and the City film; she is seen through a win