Rufus and Martha Wainwright's A Not So Silent Night is a family Christmas show with a lot of special guests.

The shows are a Wainwright/McGarrigle family Christmas tradition that have their deepest roots with the sisters Kate, Anna, and Jane McGarrigle singing Christimas carols and songs with their father Frank and mother Gaby in Saint-Sauveur-des-Monts. They grew into almost annual concerts in New York, Montreal, Los Angeles, Nashville or London. For this special show, Rufus and Martha are joined by special guests for an evening of the holiday spirit.

When Kate was diagnosed with sarcoma, a rare form of cancer, she began raising money and awareness for funding research into sarcoma as there were no drugs available to treat the cancer that she had. In December 2009 she performed her last concert, the family Christmas show at a sold out Royal Albert Hall in London. More than 5000 people attended this show that had a star-studded guest line up ranging from French and Saunders, to Guy Garvey, Boy George, Brian Eno, Linda Thompson, Peter Gabriel among family members Lucy Wainwright Roche, Sloan Wainwright, Anna and Jane McGarrigle and others. No one in the audience remained untouched by the heightened emotion of the evening.

For this occasion Kate had written a heartbreaking new song called Proserpina that tells the story of Hera bemoaning the loss of her daughter Proserpina who married Hades and lived with him for half of the year in the underworld only to return to her mother in the spring and summer bringing warmth and light. It mirrored Kate's own situation knowing she was to leave this world soon but also her daughter Martha was bound to remain in London not being able to come home to her mother after the premature birth of her son Arcangelo.

Rufus and Martha continued the legacy of Kate and dedicated themselves to raising awareness and money for Sarcoma research with these shows. Shortly after she passed they launched the Kate McGarrigle Foundation for Sarcoma Research that has since turned into the Kate McGarrigle Fund with SU2C and EIF, two powerful American and Canadian not for profit organisations who are dedicated to helping Rufus and Martha grow the impact of their work fighting sarcoma and furthering also the artistic legacy of their mother Kate.

Rufus and Martha along with many who are working on this show are donating their services. The profits from these concerts will go towards the Kate McGarrigle Fund supporting sarcoma research and a music therapy program for cancer patients to be launched by Martha Wainwright in conjunction with Stand Up To Cancer Canada.