Princess Märtha Louise of Norway celebrates her 40th birthday on 22 September 2011. According to VG Nett 18 June 2011, Princess Märtha Louise's husband Ari Behn has in an interview with the TV2 show "God Kveld Norge" ("Good Evening Norway") confirmed that her birthday will be celebrated with a big party at the Royal Palace, hosted by Their Majesties King Harald and Queen Sonja.
Besides the couple's friends, "culture personalities" and representatives of the official Norway are also on the guest list. The bi-weekly magazine Se og Hør's court reporter Kjell Arne Totland claims to know that he has known about the planned celebrations for some time, and he says that many foreign royals are expected, including guests from Sweden, Denmark, the Netherlands, Belgium and Luxembourg.
The Royal Court has not wished to comment.