The Royal Court told PEOPLE on Oct. 23 that the princess' was "on sick leave, initially for a week" due to the side effect of a medication she was taking for chronic lung disease It was announced in ...

Mette-Marit has chronic pulmonary fibrosis and has not undertaken any engagements since Jan. 28 Rune Hellestad - Corbis/Getty Norway's Crown Princess Mette-Marit's health has worsened, and she will ...