Princess Charlotte, Archie Harrison and more royal birthdays in May

Prince Guillaume (also known as Guillaume Marie Louis Christian) kicks off the list of royal birthdays. The reigning monarch is 56-years-old. As a father of four, is married to Sibilla Sandra Weiller.

Prince William and Kate Middleton’s little girl is marking a special milestone this year. The cheeky little royal will celebrate her fifth birthday. Of course, the occasion will be marked with a new set of photos showing just how grown she’s gotten.

In her five years, Charlotte has already attended special engagements, made her debut as a pagegirl for a major royal wedding and got a promotion to big sister.

Pauline is Princess Stephanie’s oldest daughter, and grandaughter to the late Grace Kelly. The Monaco royal remains largely by her family’s side during engagements and special events. Pauline has a love for fashion, festivals and funky photos. And is always spotted front row during fashion week.

Archie Harrison is the first child of Prince Harry and Meghan Markle and greatgrandchild of Queen Elizabeth. The adorable tot began his life in the UK, but relocated to North America with his parents, shortly before his second birthday.

Arch has only been around for a short period of time, but he has already marked key milestones including a trip to Africa, a public meeting with one of the biggest world leaders – and keeping his parents on their toes.

Prince Carl Philip (a.k.a Duke of Värmland) is the only son of King Carl Gustaf and Queen Silva. The handsome Prince is also the younger brother of Crown Princess Victoria and Princess Madeleine.

The royal is proud father to Prince Alexander and Prince Gabriel and husband to Princess Sofia. Carl Philip was the heir to the Swedish throne for seven months, until January 1980, when a change in the constitution mandated that succession be marked by natural birth order.

Zara Phillips is the only daughter of Princess Anne and Mark Phillips and the eldest granddaughter of Queen Elizabeth. The royal, who doesn’t have an official title. has always excelled in sports, and is a prize Equestrian.

In 2011, Zara married Mike Tindall. The pair are parents to daughters Mia and Lena. Fun fact, Zara is also the godmother of Prince William and Kate Middleton’s son Prince George.

Queen Maxima (the Queen of Hats) is known for her impeccable fashion sense and ability to successfully pull off her signature toppers. The Argentinian-born Queen is married to Prince Willem-Alexander.

From their union, the pair have welcomed three daughters, Princess Catharina-Amalia, Princess Alexia and Princess Ariane. Maxima admitted that when her husband told her that he was a Prince, she thought that he was joking.

Crown Prince Frederik is the oldest son of Queen Margrethe and Prince Henrik and the heir to the Danish throne. The family-oriented royal is married to the rather-stylish Crown Princess Mary.

Frederik is also the proud father to four children, Prince Christian, Princess Isabella, and twins Vincent and Josephine. The Prince also has a strong passion for science, global warming and recently, his quarantine facial hair.