On 20 October 2012, Hereditary Grand Duke Guillaume and Hereditary Grand Duchess Stéphanie’s religious wedding ceremony took place in the Notre-Dame Cathedral of Luxembourg. The ceremony was officiated by H.E. Jean-Claude Hollerich S.J., Archbishop of Luxembourg.

After the ceremony, the newlywed couple appeared on the Palace’s balcony to greet the crowds. They were joined by the Grand Ducal Family as well.

Official photos of the Hereditary Grand Ducal couple, their families, and their royal guests were published.

In the evening, Hereditary Grand Duke Guillaume and Hereditary Grand Duchess Stéphanie watched a firework show to celebrate their wedding.

Hereditary Grand Duchess Stéphanie wore an Elie Saab Couture wedding gown with the Lannoy Family tiara.

For the fireworks in the evening, Hereditary Grand Duchess Stéphanie wore the same Chanel suit she wore for her civil wedding ceremony.

Grand Duchess Maria Teresa wore a Natan outfit with Natan pumps and a Fabienne Delvigne headpiece.

Princess Alexandra was one of the bridesmaids and she wore a Natan Couture gown.

Then-Princess Tessy wore a Natan outfit with a Natan clutch and a Fabienne Delvigne hat.

Princess Claire (then still Claire Lademacher) wore a Jil Sander coat.

Queen Mathilde wore a Natan outfit with an Anna Cecere clutch and a Fabienne Delvigne hat.

Princess Astrid wore a Christian Dior coat with Christian Dior pumps and an Armani clutch.

Queen Maxima wore a Natan outfit with Sergio Rossi shoes and a Fabienne Delvigne hat.

Queen Sonja wore a beige skirt suit.

Crown Princess Mette-Marit wore her Valentino coat and Carolina Herrera dress with her Christian Louboutin pumps and her Prada clutch. She also wore a Prada headband.

Princess Märtha Louise wore a grey dress with Jimmy Choo accessories and a Lock & Co hat.

Queen Silvia wore a magenta skirt suit.

Crown Princess Victoria wore a Fadi el Khoury outfit with her LK Bennett pumps.

Queen Margrethe wore a purple skirt suit and her Salvatore Ferragamo bag.

Crown Princess Mary wore a burdungy suit with her Prada pumps, Naledi Copenhagen clutch, and Susanne Juul hat.

Queen Letizia wore a Felipe Varela outfit with Magrit pumps, a Felipe Varela clutch, and a Pablo y Mayaya hat.

Princess Caroline wore a Chanel Haute Couture outfit.

The Countess of Wessex wore an Emilia Wickstead dress with Jimmy Choo pumps and a Jane Taylor hat.

Queen Anne-Marie wore a pale green outfit with a Philip Treacy hat.

Crown Princess Marie Chantal wore a Christian Dior dress with Christian Dior pumps and her VBH clutch. She paired the outfit with a Philip Treacy hat, JAR earrings, and her Cartier bracelet.