In a farewell speech made last night, Queen Beatrix said she had been struck by "overwhelming expressions of heartfelt sympathy" since she announced her decision to retire.
She added, "With the abdication of my role as monarch, I'm fulfilled foremost with feelings of deep gratitude. Without your heartwarming and encouraging signs of affection, the burdens - which certainly there have also been - would have weighed very heavily."
"Now that my eldest son is taking on this beautiful and responsible task tomorrow, it is my dearest wish that the new royal couple feels supported by your loving trust. I am convinced that Willem-Alexander will commit himself with faithful devotion to everything a good king is indebted to do."
Last night a gala dinner in honour of Queen Beatrix took place at the world famous Rijksmuseum in Amsterdam.
Among the guests were Prince Charles and his wife Camilla, Duchess of Cornwall.
Prince Willem-Alexander will become the Netherlands' first King in more than a century when he is crowned during today's ceremony.
His mother Queen Beatrix announced she would abdicate earlier this year, after reigning for 33 years.
Members of the Dutch Royal Family held a dinner last night in honour of Queen Beatrix at the world famous Rijksmuseum in Amsterdam.
Today over 2,000 guests will attend the abdication and investiture at Nieuwe Kirk, in Amsterdam.