In May, King Harald’s older sister, Princess Astrid, was hospitalized following heart failure. Anette Ask/The Royal Court Princess Astrid on May 4, 2026. It’s been a tough few months, health-wise, for the Norwegian royal family. Crown Princess Mette-Marit recently underwent a lung transplant and was discharged from the hospital in mid-July. In addition, in May, Queen Sonja was hospitalized with heart failure.