According to Hello Magazine:
With only two months to go until the big day, Countess Stephanie de Lannoy, who is due to marry Prince Guillaume of Luxembourg, has had to deal with some very sad news.
Her mother, Countess Alix de Lannoy, passed away on Sunday after suffering a stroke.
The 70-year-old had eight children with her husband Count Philippe, whom she married in 1965.
Her youngest daughter Stephanie announced her engagement to Prince Guillaume in April and is set to walk down the isle on Saturday, October 20.