Countess Alice de Lannoy attends the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg on October 20, 2012 in Luxembourg, Luxembourg.
- [Sean Gallup/AFP/Getty Images]

Princess Sibilla of Luxembourg attends the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie.
- [Sean Gallup/AFP/Getty Images]

Crown Princess Mary of Denmark sports a grey velvet topper as she attends the wedding ceremony of Prince Guillaume of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg on October 20, 2012 in Luxembourg, Luxembourg.
- [Pascal Le Segretain/AFP/Getty Images]

Princess Tessy of Luxembourg, in a sweeping grey hat, attends the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg on October 20, 2012 in Luxembourg, Luxembourg.
- [Sean Gallup/AFP/Getty Images]

Countess Luisa de Lannoy attends the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg on October 20, 2012.
- [Sean Gallup/AFP/Getty Images]

Queen Beatrix of the Netherlands in a head-to-toe lavender number.
- [Sean Gallup/AFP/Getty Images]

Queen Anne Marie of Greece wears a hat of delicate gold bows.
- [Sean Gallup/AFP/Getty Images]

Prince Carl-Philip of Sweden and Princess Maertha Luise of Norway attend the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie of Luxembourg.
- [Pascal Le Segretain/AFP/Getty Images]

Lydia de Schaetzen attends the wedding ceremony of Prince Guillaume Of Luxembourg in a bright pink and beige ensemble.
- [Pascal Le Segretain/AFP/Getty Images]

Princess Maxima of the Netherlands stands out in a tall, feathered hat.
- [Pascal Le Segretain/AFP/Getty Images]