King Willem-Alexander of the Netherlands will celebrate his 50th Birthday on April 27th. Though the royal family will be in Tilburg on the 27th, they are hosting a Gala Dinner Royal Palace in Amsterdam for 150 guests. In honour of the occasion, we are flashing back to previous Dutch royal milestone birthdays. Today’s feature- Queen Beatrix’s 60th Birthday in January 1998. Celebrated over two days, the events were attended by many foreign royals. Take a look below at some of the guests-

Due to bombings by terrorist group ETA in Sevilla, King Juan Carlos, Queen Sofía and Infanta Pilar of Spain only at… twitter.com/i/web/status/9…

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  (@RoyalArjan) January 27, 2018

Today in 1998: Dutch Queen Beatrix celebrates 60th birthday at @paleishetloo, + Sonja, Margarethe II and Anne-Marie http://t.co/1bju4sZZbd

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Paul Rem (@PaulHRem) January 31, 2015

More guests at the Royal Palace: Empress Farah of Iran with daughter-in-law Yasmine, the Kings and Queens of Bulgar… twitter.com/i/web/status/9…

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  (@RoyalArjan) January 27, 2018

On the evening of January 30th, the Dutch Royal family and their guests attended a Ballet performance at the Muziek Theater in Amsterdam, while on the evening of the 31st, there was a gala dinner at the Royal Palace of Amsterdam.

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More guests at the Muziek Theater: King Harald V and Queen Sonja of Norway, King Constantine II and Queen Anne-Mari… twitter.com/i/web/status/9…

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  (@RoyalArjan) January 27, 2018

At the Ballet Performance, Queen Beatrix wore a purple and magenta gown with pearls and a black cape. She was seen with the Prince of Wales, who wore Black Tie. Then Crown Prince Willem Alexander also wore Black Tie.

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For the Ballet Performance, Queen Sonja of Norway wore a navy skirt with a long jacket, floret earrings, and an art deco brooch. King Harald of Norway wore Black Tie. For the Gala Dinner, Queen Sonja wore a white gown with Queen Alexandra’s diamond pendant earrings. King Harald wore Black Tie.

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For the Ballet Performance, Queen Silvia of Sweden wore a sequined gown. King Carl XVI Gustaf of Sweden wore Black Tie. For the Gala Dinner, Queen Silvia wore a purple gown with diamond floral earrings. King Carl Gustaf wore Black Tie.

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For the Ballet Performance, Queen Margrethe of Denmark wore a black lace top over a navy skirt with her modern ruby and gold suite. Prince Henrik of Denmark wore Black Tie. For the Gala Dinner, Queen Margrethe wore a green silk gown with a diamond riviere, earrings, and brooches. Prince Henrik wore Black Tie.

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For the Ballet Performance, Queen Anne Marie of Greece wore an aquamarine gown with pearls. King Constantine of Greece wore Black Tie. For the Gala Dinner, Queen Anne Marie wore a striped gown with the necklace and earrings from her Ruby Parure.

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For the Ballet Performance, Grand Duchess Maria Theresa of Luxembourg wore a black gown with gold jewelry. Grand Duke Henri of Luxembourg wore Black Tie. For the Gala Dinner, Grand Duchess Maria Theresa wore a navy gown with a choker. Grand Duke Henri wore Black Tie.