at the Danish National Hospital, the same place in which their eldest children,
, have become the darlings of the royal family and, indeed, the whole country.
After six days in hospital, the crown prince and princess introduced their twins to the world.
The proud dad posed with Josephine while his wife Mary held their son
Vincent and Josephine were born on the morning of January 8, 2011 at 10.30 and 10.56 respectively.
According to an official statement from the Danish royal household, the little boy weighed 5lbs 11oz and his sister 5lbs 80z
The twins' official debut was on the 25th of february 2011.
Photographer Steen Brogaard was given the honour of capturing the babies' first official pictures
In this family portrait, Mary has her daughter in her arms but can't stop looking at Vincent, who is sleeping in his father's arms
Prince Mary and Prince Frederick arriving at Holmen church in Copenhagen where they baptised their twins on April 14
The three-month-old twins were officially named Prince Vincent Frederik Minik Alexander and Josephine Sophia Ivalo Mathilda
The official photograph of the twins' baptism.
Vincent's godparents are Prince Felipe of Spain, John Donaldson Jr, the princess' brother; Prince Gustav of Berleburg, Frederik's cousin and Duke Michael Ahlefeldt-Laurvig-Bille.
His godmums were Mary's former lady-in-waiting Caroline Hering, a good friend of the future queen's since she moved to Europe and socialite Baroness Helle Reedtz-Thott
Josephine's godmums were her aunt, Princess Marie; Patricia Donaldson, another aunt on her mother's side; Birgitte Handwerk, wife of Jeppe Handwerk, Frederik's best friend from his naval days and Josephine Rechner a friend of Mary's, who lives in Melbourne.
Princes Charles of Bourbon and Count Bendt Wedell, one of the wealthiest landowners in Denmark, acted as godfathers
The adorable six-month-olds were the stars of the show at the annual summer photocall
Last August, the beautiful babies stole the show as their parents arrived at Skagen port aboard the Royal Yacht Dannebrog to begin a four-day summer tour of northern Denmark
In November, the royal couple released their second official family portrait since the christening
Josephine and Vincent blow out their candles with a little help
The happy twins posing for their official birthday pictures