In celebration of her birthday today, we are taking a look at Crown Princess Mary's outfit at Prince Christian's christening. 

When Crown Princess Mary and Crown Prince Frederik's first child was to be christened on January 21, 2006, Mary chose a printed Hugo Boss skirt and a Birgit Hallstein dusty blue blazer with white trim. She also wore a pair of nude Yves Saint Laurent pumps. Mary also wore a floral headpiece cream/nude by Malene Birger that we would see at the subsequent christenings of her other three children.

As a gift for the christening, Queen Margrethe gave Mary's a brooch to wear, as well. It was a royal heirloom that had been given to Margrethe by her mother, Queen Ingrid, who had been given it by her mother, Princess Margaretha of Sweden. 

In Danish tradition, the newborn prince's name was not revealed until the ceremony, which took place in the Christiansborg Palace Chapel in central Copenhagen. His names were then announced as "Christian Valdemar Henri John." It should be noted his name continued the tradition of future kings being named either Christian or Frederik, as the names are alternated between the two. The ceremony was performed by Bishop Erik Norman Svendsen.

The three-month-old (he was born October 15, 2005)'s godparents were his paternal uncle: Prince Joachim, maternal aunt: Jane Stephens, Crown Prince Haakon and Crown Princess Mette-Marit of Norway, Crown Princess Victoria of Sweden, Crown Prince Pavlos of Greece, and two friends of his parents: Jeppe Handwerk and Hamish Campbell. 

Christian wore the traditional Danish royal christening gown which was first worn by King Christian X. A silver baptism font from 1660 was also used. Both went on display afterward at Amalienborg Palace.