Three years after the passing of singer George Michael, his sister Melanie Panayiotou was pronounced dead on Christmas Day at the age of 55.

TMZ reported that the late singer’s sister was in her London home at the time of her death and was dead on the scene after her sister Yioda called an ambulance. Reports say her passing is not being treated as suspicious. 

Her family issued a statement regarding Melanie’s passing. “We can confirm that very tragically Melanie has passed away suddenly,” her family said. “We would simply ask that the family’s privacy be respected at this very sad time. There will be no further comment.”

Michael’s Wham! bandmate Andrew Ridgeley also addressed Melanie’s passing on Twitter.

During the anniversary of Michael’s death, his family released a statement on his website to celebrate his life and thanking fans all over the world for their support. "We will be swerving the bad and enjoying the good as much as we can this coming year," the family wrote on the site. "We know how much his lyrics can offer support when things are tough and help celebrate when times are good and life is going well... and that is just as powerful now as if he were still with us and as many of you say in your messages, it's a gift," the family added.

Michael’s legacy was honored last month with the release of the film, “Last Christmas.” The movie was named after one of his hit songs, with the story inspired by the late musician’s music. The soundtrack also included an unreleased song from Michael. The romantic film starred Henry Goulding and Emilia Clarke in the lead roles. Melanie offered her thoughts on the film, saying that her brother “adored Christmas and he loved the idea of this film. I am sure he will be enjoying seeing Emilia [Clarke]'s amazing light bulb smile, something they share, across the celestial miles."

George Michael British singer George Michael performs on stage during his "Symphonica" tour concert in Vienna, Sept. 4, 2012. Photo: Reuters