Various royal houses have announced the attendance of their members at the 50th birthday celebrations for Crown Prince Frederik of Denmark this weekend. The Crown Prince will turn 50 on 26 May.
Photo released for Crown Prince Frederik’s 50th. © Photographer Steen Evald
Just last year the royals all travelled to The Netherlands to celebrate King Willem-Alexander’s 50th birthday and Norway to celebrate King Harald and Queen Sonja’s 80th birthdays. This year, they will arrive in Denmark. It was a given that the royals of the other Scandinavian houses would be in attendance as they are close friends and family of the Danish royals. 
Naturally, the entire Danish Royal Family will be in attendance, and the Greek Royal Family is expected as they are his aunt, uncle, and first and second cousins. It would also be safe to assume that some family members of Crown Princess Mary may fly in from Australia.
Below is a list of those royals who have, so far, announced their attendance. The list will be updated when and if other royals reveal who they are sending.
Belgium: King Philippe and Queen Mathilde
Luxembourg: Grand Duke Henri and Grand Duchess Maria Teresa
The Netherlands: King Willem-Alexander and Queen Máxima
Norway: Crown Prince Haakon and Crown Princess Mette-Marit
Sweden: King Carl XVI Gustaf, Queen Silvia, Crown Princess Victoria and Prince Daniel
The royals from around the world pictured at the celebrations for King Harald and Queen Sonja in 2017. Photo: Thomas Brun/NTB Scanpix/Royal Court, Norway
King Felipe and Queen Letizia of Spain both have engagements on the 26th, so neither will be in attendance at the celebrations. Casa Real does not have anyone listed to attend.
