Catharina-Amalia and her sisters attended the annual
Koningsdag. On the occasion of her 18th birthday in 2021, a biography of Catharina-Amalia was published. Similar books were published on the 18th birthday of
Princess Beatrix in 1956 and Prince Willem-Alexander in 1985. The book titled "Amalia" is written by Dutch entertainer
Claudia de Breij. On 8 December 2021, Catharina-Amalia assumed her seat in the Advisory Division of the
Council of State when she reached the
age of majority at 18 the day before. On the same day, she gave her first public speech at the
Council of State meeting in
Kneuterdijk Palace. An outdoor birthday party thrown by her family to mark the occasion was found to be in breach of regulations and restrictions imposed during the
COVID-19 pandemic, which made her father admit that "it was not right to organize this". On 17 June 2022, together with her parents, she was among the royal guests invited to the celebrations of the 18th birthday of
Princess Ingrid Alexandra of Norway. This was Catharina-Amalia's first public engagement outside of the Netherlands and the first occasion to which she was allowed to wear a
tiara. On 20 September 2022, together with her parents, Catharina-Amalia attended
Prinsjesdag, where the King addressed a joint session of the
States General of the Netherlands to outline government policy for the upcoming parliamentary session. In November 2022, Catharina-Amalia and her family visited an exhibition at
Nieuwe Kerk dedicated to
Queen Juliana. In December 2022, she visited the three branches of Dutch military: Air Force, Army and Navy. meeting with King
Charles III In January and February 2023, Catharina-Amalia went on a tour of the
Dutch Caribbean with her parents. They visited Aruba, Curaçao, Sint Maarten,
Bonaire,
Sint Eustatius, and
Saba. It was her first official royal tour. In April 2023, Catharina-Amalia and her sister Princess Ariane attended King's Day concert in
Rotterdam. On 5 May 2023, she accompanied her grandmother to a reception held at
Buckingham Palace the evening before the
coronation of King Charles III and Queen Camilla of the United Kingdom. In June 2023, she and her parents attended a state banquet honoring the
wedding of Crown Prince Hussein of Jordan and Rajwa Al Saif. She carried her first solo official trip abroad in October 2023 by attending
Prince Christian of Denmark's 18th birthday celebration banquet at
Christiansborg Palace, Denmark. Catharina-Amalia attended her first state banquet, honouring
King Felipe VI and
Queen Letizia of Spain, in April 2024. In June 2025, Catharina-Amalia underwent surgery after falling from a horse and fracturing her arm.
Public image Catharina-Amalia has experienced repeated
fat shaming by tabloids and on social media since she was young, most notably by the Portuguese celebrity magazine
Caras labeling her as plus size. In response to the body shaming, members of the public have expressed their support for the princess, calling the fat shaming against her unacceptable.
Annual allowance Catharina-Amalia became entitled to an annual allowance from the Dutch state upon reaching the age of 18. This allowance consisted of two parts: a personal income component of €296,000 and a €1,338,000 allocation for staff and operational expenses. Following her high school graduation, Catharina-Amalia opted to decline the annual allowance until she completed her studies. In May 2024, citing changed circumstances, Catharina-Amalia announced she would begin utilizing her annual allowance for staff and operational expenses, starting in January 2025. This decision comes despite her ongoing studies. Her annual allowance for staff and operational expenses has continued to increase in recent years and amounted to €1.5 million in 2024. ==Titles, styles, honours and arms==