Countess Hélène d’Udekem d’Acoz, daughter of the deceased Count Patrick d’Udekem d’Acoz and younger sister to Princess Mathilda of Belgium married baron Nicholas Janssen in the church of Saint Pierre de Bastogne. The bride was led to the altar by her brother. Prince Philip, Princess Mathilde and their children as well as Queen Fabiola were present at the wedding.
This illustrated article is in French:
http://www.noblesseetroyautes.com/
Pictures of the wedding: http://www.wireimage.com/GalleryListing.asp?navtyp=gls====505697&nbc1=1