THE eldest son of Norway’s crown princess is due to go on trial on Tuesday after being arrested on the eve of proceedings on charges including rape.

Marius Borg Hoiby was arrested on Sunday evening and accused of assault, making threats with a knife and breaching a restraining order, police said.

Prosecutors have requested four weeks’ detention, citing a risk of reoffending.

He is expected to appear before Oslo district court on Tuesday.

The indictment contains 38 counts, including rape, abuse in a close relationship against one former partner, acts of violence against another, death threats, traffic offences and transporting 3.5 kilograms of marijuana.

It centres on four alleged rapes between 2018 and November 2024, as well as alleged violence and threats against former partners and violations of a restraining order.

Mr Hoiby has been under scrutiny since being repeatedly arrested in 2024 and was indicted in August, though he had remained free pending trial until Sunday.

His defence team said he “denies all charges of sexual abuse, as well as the majority of the charges regarding violence.”

The trial opens amid renewed scrutiny of his mother, Crown Princess Mette-Marit, following the release of new documents linked to sex offender Jeffrey Epstein.

Norwegian media reported that the files include hundreds of mentions of the crown princess and confirm she borrowed a property belonging to Epstein in Florida in 2013.

In a statement, Ms Hoiby said she regretted the contact, admitted to “poor judgment” and expressed sympathy with Epstein’s victims.

Crown Prince Haakon said the royal family would not attend court, stressing Mr Hoiby has no royal title and is subject to the law like any other citizen.