then Mark has a new king , and in the last hour he's been greeted by tens of thousands of people who gathered in the Danish capital , Copenhagen .
Here you can see him as he stepped out to greet the crowd from the balcony of Christians Borg Palace .
It was just after he was proclaimed by the prime minister , and , as you can see there he was joined by his Australian born wife , Queen Consort Mary ..
The crown passed to Frederick the 10th , when his mother , Queen Margrete , signed the instrument of abdication after more than 50 years on the throne .
Queen Margrete , who's 83 has now left Christians Ball Castle and is the first Danish monarch to voluntarily renounce the throne in more than 800 years .
She said she was stepping aside due to health reasons .
Well , our royal correspondent , Daniella Ralph , is in Copenhagen , and earlier she talked me through the day's events .
Well , there we have it , the new face of the Danish monarchy out on the balcony there of Christians , Borg Palace and as well as the new king and queen .
Of course , you have to remember that there is also a new heir to the throne .
We've seen some pictures there of the young Crown Prince Christian , as he now is just 18 years old .
Uh , he is still at school in his final year at school , expected to go to uni first next year and into military training .
But he takes on a significant role in public life now here in Denmark .
But this is the new face of the Danish monarchy , and I have to say you're looking at King Frederick and Queen Mary .
There they both seemed quite taken aback by the size of the crowd and the response to them .
Here in Denmark , we saw the king wiping away a tear from his eyes as , uh , he first came out on that balcony for the proclamation and saw the number of people the response to him , the number of Danish flags being waved as the royal couple take it in this moment in history .
But this king and queen , both in their fifties , become the new face of the royal family here in Denmark , and they take on a very popular legacy from Queen Margreta polling for , uh , the Danish royalty here is consistently at around 80% and they are very popular figures in public life and the final moments we are now watching as the king from the balcony of the Christians for Palace .
So the final wave to the crowd as he takes in the site below him and starts the first day of his reign as King Frederick the D 10th of Denmark , and in his speak speech to the people from the balcony a little earlier , he talked about his hopes of becoming a unifying king of tomorrow of honouring his mother .
She will always be remembered as an extraordinary queen , he said , and it is hoped that he becomes a unifying king for the whole of Denmark and maintains the popularity and relevance of the monarchy here for the Danish people , some happy news there for a change .