McGarrigle's brother-in-law, Dane Lanken, told The Canadian Press he expects singer Emmylou Harris to be among those who attend the service.
The 63-year-old McGarrigle died at her Montreal home on Jan. 18 after a battle with cancer.
She and her sister Anna became known as the McGarrigle Sisters and began their careers performing at Montreal coffeehouses in the 1960s with a group called the Mountain City Four.
They were perhaps best-known to Canadians for their distinctive rendition of Wade Hemsworth's The Log Driver's Waltz," which was featured in a 1979 animated short done by the National Film Board.
Kate McGarrigle was invested with the Order of Canada in 1994, while she and Anna received the Governor General's Performing Arts Award in 2004.
