Norway’s Princess Ingrid Alexandra is turning 18 on January 21, and much like other young princesses around the world, her coming of age signals big changes in her role as a member of the royal family. Find out what Princess Ingrid has to look forward to and how the lives of other teen princesses changed when they reached adulthood. Princess Ingrid Alexandra of Norway While her father Crown Prince Haakon, the only son of King Harald V and Queen Sonja , is next in line to the throne over his elder sister Princess Märtha Louise, Ingrid is ahead of her younger brother in the succession line after the Norwegian constitution granted absolute primogeniture in 1991. The occasion of her 18th birthday would have involved a gala dinner at the palace with other royals in attendance, and it would have been the first time the aspiring pilot wore a tiara. However, celebrations have been scaled down due to the pandemic. Her birthday week was also due to include a gala dinner at Oslo’s new library, plus meetings with parliament and the judiciary. Now, the military will perform a 21-gun salute as a tribute to the future monarch. Other events to acknowledge the national day of celebrations have been postponed, although they may be held later in the year. First in line: 5 European princesses set to become queens Princess Aiko of Japan Princess Aiko turned 20 years old in December , the age when Japanese princesses begin royal duties. She celebrated on January 1 at the Imperial Palace Tokyo, wearing a tiara and surrounded by her family, including parents Emperor Naruhito and Empress Masako . The Emperor’s younger brother Crown Prince Fumihito Akishino is next in line to the throne and the prince’s son Prince Hisahito follows due to only male heirs being able to ascend. Still, Princess Aiko is expected to carry out official engagements, including travel abroad, much like her cousins Princess Kako and Princess Mako, who recently gave up her status as a working royal and moved to New York with her commoner husband . 6 ways Meghan Markle’s life changed after she became the Duchess of Sussex Lady Louise Windsor of Britain Prince Edward and Sophie Wessex chose not to give their children prince and princess titles from birth to protect their privacy and allow them the choice of growing up away from the spotlight. Although Louise had the option of adopting the Her Royal Highness (HRH) title once she came of age last November, her mother has long said it was unlikely she would and that she had raised her children to expect to work outside royal duties. While Louise has maintained a semi-private life, she has stepped up her public role in adulthood and made her on-screen debut in a BBC documentary last year, talking about her late grandfather Prince Philip . Reports have since surfaced that she may change her mind about becoming HRH and officially take on more royal duties. Lady Louise Windsor: Queen Elizabeth’s favourite grandchild? The Netherlands’ Princess Amalia of Orange Crown Princess Catharina-Amalia Beatrix Carmen Victoria is next in line to the throne after her father, King Willem-Alexander of the Netherlands, who became the ruler after his mother Queen Beatrix abdicated in 2013. She holds the title Princess of Orange as the heir to the throne. When she turned 18 in December, her father appointed her Knight Grand Cross in the Order of the Netherlands Lion, and Knight in the House Order of the Golden Lion of Nassau. She also became a member of the Council of State and the Advisory Division. View this post on Instagram A post shared by Koninklijk Huis (@koninklijkhuis) However, Princess Amalia has expressed reluctance to rule and even refused to accept a US$1.8 million annual allowance she was due to receive on her 18th birthday, in solidarity with other students her age who are struggling due to the Covid-19 pandemic. Claudia de Breij’s biography titled Amalia , written with the approval of the royal family to introduce her to the public, claims that if her father were to die when she was still young, she would invite her Argentine-born mother Queen Maxima to become head of state. Kate Middleton at 40: 5 ways her life changed upon becoming a royal Princess Alexia of the Netherlands As Princess Amalia has no children for now, her sister Princess Alexia, 17, follows in line to the throne. Alexia, who studies alongside Spain’s Princess Leonor at the prestigious UWC Atlantic College, in the Vale of Glamorgan in Wales, does not have any official duties at the moment. View this post on Instagram A post shared by PrincessAlexia (@_princess_alexia_13) However, when she turns 18 in December, she will be stepping into the role that supports her sister as she prepares to rule. Want more stories like this? Sign up here. Follow STYLE on Facebook , Instagram , YouTube and Twitter .