Who is this? She looks like she could be related to Henri of Luxembourg.
She, Marie Christine, is related to Henri......she is his niece.
Marie Christine (1983) is the eldest child and daughter of Princess Marie-Astrid of Luxembourg ( = the eldest and older sister of Henri) and Archduke Carl Christian of Austria. She married Count Rodolphe de Limburg Stirum, the man next to her in the picture. Together they have 3 children (or perhaps even 4).