Marius Borg Høiby Trial: Key Details and Developments

Oslo, Norway – Marius Borg Høiby, the 29-year-old son of Crown Princess Mette-Marit, is currently on trial in Oslo, facing 40 criminal charges, including rape and domestic violence. The trial, which began in early March 2026 and is expected to conclude on March 13, 2026, has garnered significant attention in Norway. Høiby is being held at Oslo Prison as the proceedings unfold.

Background and Charges

Marius Borg Høiby was born on January 13, 1997, to Mette-Marit Tjessem Høiby and Morten Borg. He is not a member of the royal family and holds no official position within the Norwegian monarchy. The current legal proceedings stem from incidents involving a woman referred to as “Frogner-kvinnen” (the Frogner woman) by Norwegian media.

The charges against Høiby include one count of rape, grievous bodily harm, bodily harm, criminal damage, sexually offensive filming/photography, reckless behavior, and multiple violations of a restraining order. Six additional charges were added in mid-February 2026, including drug possession, speeding on a motorcycle, and further violations of the restraining order. Another count was added in early March 2026.

The Frogner Woman’s Testimony

The Frogner woman testified on March 4th and 5th, 2026, detailing a tumultuous relationship with Høiby. She described instances of violence, including being pushed into a door resulting in injury, and threats involving a knife. She stated that Høiby allegedly threatened self-harm in front of her during an argument.

The woman recounted a pattern of manipulation and control, noting that despite the abusive behavior, she sometimes felt guilty for reporting him to the police. She also described a period of continued contact with Høiby, even after a restraining order was in place, and expressed concerns that his actions were motivated by a desire to present a favorable image to the court.

She also revealed that she briefly reconnected with Høiby through a mutual friend in the autumn of 2025, and they later met at a bar in Oslo, leading to further contact. She perceived him as being drug-free during this period, but acknowledged ongoing arguments.

Høiby’s Admissions

Høiby has pleaded guilty to most of the charges against him, including reckless behavior and violating the restraining order against the Frogner woman. He also admitted to some violence and damage to property in a previous statement to NRK.

Previous Arrests

Høiby has been arrested four times in connection with these allegations, including a recent arrest on February 1, 2026, just days before the trial began. He was also previously detained in November 2024 on charges of rape.

Ongoing Trial and Next Steps

The trial is ongoing, with the Frogner woman’s testimony being central to the case. Høiby’s defense attorney, Petar Sekulic, has emphasized that all parties involved have their own accounts to share. The trial is expected to conclude on March 13, 2026, at which point a verdict will be delivered.