King Harald and Queen Sonja's joint 80th birthday bash is attended by the who's who of European royals: See all the photos

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Queen Sonja and King Harald’s 80th birthday celebration was a royal affair to remember. A number of royals from across Europe flocked to Norway for the two-day festivities that kicked off on Tuesday, May 9. The event was a joint celebration in honor of the Queen’s upcoming milestone birthday on July 4 and the King’s birthday, which passed earlier this year on February 21. Photo: Thomas Brun/Norway Royal Court via Getty Images

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The King and Queen were joined by their family on the balcony ahead of the banquet dinner held at the palace. The Crown Prince Couple sang along with well-wishers and their relatives to the country’s birthday song, Hurra for Deg. During the melody, Haakon and Mette-Merit danced out the lyrics of the song that states: “We all stand around you in a ring / And look, now we’ll march / Bow, nod, curtsy, we turn around / Dance for you and hop and skip and jump / Wishing you from the heart all good things!” Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Princess Sofia showed off her baby bump in an Oscar de la Renta gown that she previously wore to the 2015 Nobel Prize Banquet. The Swedish royal, who attended with her husband Prince Carl Philip, in-laws King Carl Gustaf, Queen Silvia, Crown Princess Victoria and Prince Daniel, was escorted into the banquet along with Princess Tatiana of Greece. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Meanwhile, her husband Prince Carl Philip walked into the dinner with Belgium's Queen Mathilde. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Princess Charlene's husband escorted Crown Princess Mary to the birthday dinner. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Crown Princess Victoria and her husband Prince Daniel of Sweden shared a laugh on the Palace balcony. Photo: JON OLAV NESVOLD/AFP/Getty Images

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The belle of the ball and the man of the hour, Queen Sonja and King Harald made their way into the banquet in their honor. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Crown Princess Marie-Chantal of Greece made a floral statement donning a ballgown to the celebration. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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The Grand Duke Henri of Luxembourg chatted with Queen Maxima of the Netherlands as they arrived to the birthday dinner. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Sophie, Countess of Wessex donned an emerald green gown as she represented the UK at the joint celebration in Oslo, Norway. Photo: HAAKON MOSVOLD LARSEN/AFP/Getty Images

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Between mingling with guests and taking the microphone, King Harald stole a kiss with his wife of 49 years. The Crown Prince and his sister, Princess Märtha Louise also delivered remarks at the dinner telling their parents, “We are very fond of you.” Photo: HEIKO JUNGE/AFP/Getty Images

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Despite the chilly temperature in Oslo, King Carl Gustaf and Queen Silvia of Sweden, King Willem-Alexander and Queen Maxima of The Netherlands and Princess Astrid of Norway joined the birthday King and Queen on the balcony of the Royal Palace. Photo: Patrick van Katwijk/Getty Images

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For the banquet dinner, the royal guests were served king crab, salmon tartar with grilled cucumber, oyster-maize and radishes to start, followed by calf with peas, green and white asparagus for main, and a dessert of limestone and oxalis mousse with lemon and gingerbread, according to Royal Central. Photo: Patrick van Katwijk/Getty Images

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Inside the dinner, Crown Prince Haakon, who was seated next to Queen Silvia, underwent a dramatic transformation about halfway through. The King and Queen’s son shaved his beard “as part of the entertainment during the gala dinner.” Photo: HEIKO JUNGE/AFP/Getty Images

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Day 2 King Harald and Queen Sonja invited all their royal guests to lunch on their family yacht the 'Norge.' Following lunch, they will lunchtime cruise in the Oslo Fjord. Photo: Patrick van Katwijk/Getty Images

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Crown Prince Haakon was all smiles as he showed off his fresh face with wife Crown Princess Mette-Marit. Photo: Patrick van Katwijk/Getty Images

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Sophie Wessex, Prince Albert, Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg braved the mid-30 degree weather for the lunch. Photo: BERIT ROALD/AFP/Getty Images

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King Philippe and Queen Mathilde of Belgium, Princess Mabel of the Netherlands, Princess Beatrix, Queen Maxima and King Willem-Alexander were good sports as they arrived to Honnorbrygga in Oslo for the boat trip. Photo: BERIT ROALD/AFP/Getty Images

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The royals made sure this moment will last a lifetime as they smiled for a picture on their way to the Norge. Photo: Patrick van Katwijk/Getty Images

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Princess Sofia's baby bump was on full display in her beige ensemble along with her husband Prince Carl Philip and Greece's Prince Nikolaos and Princess Tatiana. Photo: Nigel Waldron/ Getty Images

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Crown Princess Victoria had the right idea with her attire, a warm pink coat and sneakers as she boarded the tender with husband Prince Daniel. Photo: Patrick van Katwijk/Getty Images

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Marie Chantal, with her husband Crown Prince Pavlos, had the right idea for a boat trip in her nautical attire, but as she showed off on her Instagram, her shoe choice of platform sheer wedges weren't the smartest for the close to freezing temperatures and snow. Photo: Patrick van Katwijk/Getty Images

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Crown Prince Frederik and Crown Princess Mary made their way into the Opera House for the final party of the two day affair. Photo: Nigel Waldron/ Getty Images

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Crown Prince Haakon and Crown Princess Mette-Marit coordinated in navy blue for the opera. Photo: Nigel Waldron/ Getty Images

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Denmark's Prince Joachim and Princess Marie joined the royally heavy crowd at the Opera House. Photo: Patrick van Katwijk/Getty Images

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Princess Sofia was a vision in a white, lace-paneled dress along with her husband Prince Carl Philip, who wore a tux to the special evening. Photo: Patrick van Katwijk/Getty Images

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Queen Maxima made sure her umbrella was protecting her gorgeous navy gown as King Willem-Alexander braved the wet weather. Photo: Nigel Waldron/ Getty Images

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Spain's King Juan Carlos and Queen Sofia looked like a dashing duo for the 80th birthday party. Photo: Patrick van Katwijk/Getty Images

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Princess Martha Louise of Norway and Sophie, Countess of Wessex made their way in to the Opera House together. Photo: Patrick van Katwijk/Getty Images

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Even though it was in the high-30s, floral was the theme when it came to how the royals dressed. Crown Princess Victoria opted for a black gown with flowers throughout. Photo: Nigel Waldron/ Getty Images