There had been speculation that even US President Donald Trump would come, but that is not the case.
Here is a selection of the famous guests who are actually in Oslo today, according to lists published by VG and other Norwegian media:
Presidents:
Bajram Begaj, Albania
Alar Karis, Estonia
Alexander Stubb, Finland
Volodymyr Zelenskyy, Ukraine
Catherine Connolly, Ireland
Halla Tomasdottir, Iceland
Edgars Rinkēvičs, Latvia
Gitanas Nauseda, Lithuania
Silje Karine Muotka, Norwegian Sami Parliament
Karol Nawrocki, Poland
Nataša Pirc Musar, Slovenia
Petr Pavel, Czech Republic
Frank-Walter Steinmeier, Germany
Andras Baka, Hungary
Prime Ministers and Ministers of State:
Sebastien Lecornu, France
Ulf Kristersson, Sweden
Anutin Charnvirakul, Thailand
Kings and queens:
Philippe and Mathilde of Belgium
Frederik and Mary of Denmark, with Crown Prince Christian and Princess Benedikte
Abdullah of Jordan
Alois (Prince Regent) and Princess Sophie, Liechtenstein
Grand Duke Guillaume V with Grand Duchess Stéphanie, and the abdicated Grand Duke Henri, Luxembourg
Albert II, Prince of Monaco
Willem-Alexander and Máxima, Netherlands
Felipe and Letizia, Spain
From Sweden come King Carl Gustaf and Queen Silvia, plus Crown Princess Victoria with Prince Daniel, Prince Carl Philip with Princess Sofia, and Princess Madeleine with Christopher O'Neill.
Large parts of Norway's royal family are of course expected to come: King Haakon with Queen Mette-Marit and her son Marius Borg Høiby, Harald's widow Queen Sonja and sister Princess Astrid, Crown Princess Ingrid Alexandra, Prince Sverre Magnus, Princess Märtha Louise with Durek Verrett and daughters Maud Angelica, Leah Isadora and Emma Tallulah
Sports profiles:
Ole Einar Bjørndalen, biathlon legend
Therese Johaug, ski star
Lise Klaveness, President of the Norwegian Football Association
Ståle Solbakken, national coach of the Norwegian men's football team
Bishop Olav Fykse Tveit, leader of the Church of Norway, will preside over parts of the ceremony, and all other bishops from the Church of Norway are also expected to be present. The Vatican is sending Cardinal Christophe Pierre.
