Celebrity Parents Prince Haakon spends quality time with Marius By Staff Author Published on July 15, 2006 06:00 PM Share Tweet Pin Email Crown Prince Haakon of Norway, 33, was seen spending quality time with stepson Marius, 9. Haakon gave Marius some windsurfing lessons during a father-son-only day since they were just alone. The Crown Prince has two other children with Crown Princess Mette-Marit, 32 – Princess Ingrid Alexandra, 2 and Prince Sverre Magnus, 7 months. Source: Hello! Thanks to CBB reader Mary Beth.