He was proclaimed monarch on Sunday (January 14) by Prime Minister Mette Frederiksen in front of roughly 174,000 cheering people who had converged on the capital in close to freezing temperatures.
The king succeeded his mother, Queen Margrethe II, who formally abdicated after 52 years as monarch, the first Danish monarch in nearly 900 years to voluntarily relinquish the throne.
Denmark has a constitutional monarchy, which means that the monarch as head of state must sign new laws before they come into force but the formal power remains with government and the elected parliament.
The new king and queen take the throne at a time of huge public support for the monarchy in the nation of nearly six million.
