On the Duke and Duchess of Cambridge's wedding anniversary, we are taking a look at the guest outfits of the ladies we cover. Read about what they wore during the pre-wedding gala dinner at the Mandarin Oriental Hyde Park on April 28 and the wedding at Westminster Abbey on April 29, 2011. 

Greece:

Crown Princess Marie-Chantal attended with her husband, Crown Prince Pavlos; brother-in-law, Prince Nikolaos; future sister-in-law Tatiana Blatnik; mother-in-law, Queen Anne-Marie; father-in-law, King Constantine; and one of her sons, Prince Constantine-Alexios of Greece (William's godson). For the pre-wedding dinner, Marie-Chantal was in a Louis Vuitton gown that featured a deep V in the back and a small bow

For the wedding, she was in a light blue Chanel dress and jacket with a pair of Louboutins for the wedding. She was also in a blue Philip Treacy hat. 

Luxembourg:

Grand Duchess Maria Teresa attended the wedding with Grand Duke Henri. She wore a red Elie Saab gown for the pre-wedding dinner. 

For the wedding, she was in a sky blue Elie Saab dress and jacket. 

Monaco: 

Then Charlene Wittstock (she would marry Monaco's Prince Albert in July) wore a "dove-gray silk dupioni evening dress with laser-cut silk organza appliqué and a silk chiffon stole," explained the designer Akris (via Order of Splendor).

A gray Akris coat dress was worn for the wedding; she carried a matching Allegra ostrich clutch from the same designer.

Netherlands: 

Then-Princess Maxima wore a pinkish/nude lace Jan Taminiau dress for the wedding. She and Prince Willem-Alexander attended on behalf of the then-Queen Beatrix.  

Norway:

Unfortunately, the only piece from Queen Sonja's ensembles from the pre-wedding dinner and wedding that have been identified was her hat. It was a white Lock and Co. hat with a feather in the center. 

Spain:

Then-Princess Letizia attended the wedding with her husband, Prince Felipe and mother-in-law, Queen Sofia. Sofia's outfits have not been identified, but Letizia's luckily have! For the pre-wedding dinner the night before Letizia wore a strapless, purple (with flowers on the skirt) gown by Felipe Varela. The wedding saw her in a customized pink Pablo Y Mayaya hat that featured lace. Her dress was by Felipe Varela and featured 3/4 length sleeves and floral designs on the pink dress.

Sweden:

Crown Princess Victoria and Prince Daniel represented the Swedish Royal Family at the ceremony. Victoria wore a red short-sleeved Escada gown to the pre-wedding dinner, and for the wedding, she wore a muted orange long-sleeved dress by Escada and a matching hat by Britta von Koenigsegg. 

United Kingdom:

Autumn Philips wore a purple Sassi Holford coat dress for the wedding. Her hat has not yet been ID'd. 

The outfits of Princesses Beatrice and Eugenie have been covered in a previous post. You can read it here. 

For Sophie, Countess of Wessex, she wore a red Bruce Oldefeld gown for the pre-wedding dinner. For the wedding, she was in a cream Jane Taylor hat, embroidered suit by Bruce Oldfield, and Jimmy Choo shoes. 

Zara Phillips would get married just a few months later, but for her cousin's nuptials, she wore a bespoke black Philip Treacy hat and a Paul Costelloe coat dress.