Mary Therese Hansen (1 November 1966 – 9 December 2002) was an Australian musician. She joined the London-based band Stereolab in 1992 as a singer, guitarist, keyboardist and percussionist, remaining a member of the group until her death.
In late 1999 she formed Schema with members of the Seattle-based band Hovercraft; they issued their debut album, Schema, on 19 September 2000. On 9 December 2002, Hansen was struck and killed by a truck while bicycling in London.
