The former husband of the King of Norway's daughter says actor Kevin Spacey groped him during the 2007 Nobel Peace Prize concert in Oslo.
Ari Behn, who was married to Princess Martha Louise, the daughter of King Harald, for 14 years, told Norwegian radio Spacey sat next to him at the event.
"We had a great talk," Mr Behn was quoted by the BBC as saying on Norwegian radio station P4.
"After five minutes he said, 'Hey, let's go out and have a cigarette'. Then he puts his hand under the table and grabs me …"
He said he declined Spacey's approach by saying "maybe later".
Behn, 45, married Martha Louise, fourth in line to the Norwegian throne, in 2002.
Last year, they decided to split but share custody of their three daughters.
Spacey, who was co-hosting the December event in 2007, has faced numerous sexual misconduct and assault allegations has remained mostly silent.
He came under fire for coming out as gay in his apology to actor Anthony Rapp, with members of the LGBTI community saying he was "deflecting" from Rapp's allegations.
Rapp, known for his roles in Rent and Star Trek: Discovery, has alleged Spacey made a sexual advance towards him when he was aged 14, and Spacey 26.
The embattled actor, who has won two Oscars, was also dropped from his lead role in Netflix series House of Cards.
Netflix severed ties with Spacey in November, announcing his former co-star Robin Wright would take the lead in the series' final season in 2018.
ABC and wires
