The Dutch royal family were out in full force on Saturday for King Willem-Alexander's 57th birthday, and Crown Princess Catharina-Amalia shared a sweet moment with her father while out in the crowds.

Princess Catharina-Amalia is the eldest child of King Willem-Alexander and Queen Máxima of the Netherlands, born in 2003. She became heir apparent when her father ascended the throne in 2013.

See Photos from Crown Prince Hussein and Princess Rajwa ... including a rare tiara moment for the future queen of the Netherlands, Princess Catharina-Amalia. In just her second time stepping ...

The daughter of Crown Prince Haakon and Crown Princess Mette-Marit will help host the President of Iceland next month, but ...