Mette-Marit was diagnosed in 2018 with pulmonary fibrosis which causes scarring of the lungs and shortness of breath and she had been forced to scale back her duties over the years.

Norway’s royal palace shared the first images of the country’s Crown Princess Mette-Marit on Monday since she underwent a lung transplant in June.
The palace posted an image to social media of the crown princess sitting on a couch next to her husband Crown Prince Haakon watching Norway defeat Brazil, taking the country to its first-ever World Cup quarter-final.
“Yesterday turned into a historic evening!” the Royal House of Norway said in a post to Instagram.
It added that the crown princess and crown prince had followed the game from the palace.