Martha Wainwright (born May 8, 1976) is a Canadian-American folk-rock singer-songwriter. She is the daughter of American folk singer and actor Loudon Wainwright III and Canadian folk singer-songwriter Kate McGarrigle. She was raised in a musical family along with her older brother, Rufus Wainwright, in Montreal, Quebec, Canada.
Wainwright released an independent cassette, Ground Floor, in 1997. The following year, her song "Year of the Dragon" appeared on The McGarrigle Hour, an album released by Kate & Anna McGarrigle. Shortly after this recording, Martha began singing backup vocals for her brother, and released the six-song EP Martha Wainwright in 1999.
Following her drama classes at Montreal's Concordia University, she moved to New York City, where she established herself as singer and songwriter. She made contacts within the industry, one of whom was producer Brad Albetta, who worked with Wainwright to produce her self-titled debut album, Martha Wainwright (released April 12, 2005, by MapleMusic Recordings).