According to Contactmusic.com, a Norwegian royal named Ari Behn has alleged he was fondled by the Hollywood actor during an event in Oslo ten years ago, after Spacey had just finished hosting a Nobel Peace Prize bash.
"We had a nice conversation, he was sat next to me", Behn said.
"After five minutes, he says "Hey, let's go out and have a cigarette" - and then he takes me under the table in the middle of my balls".
His wife, 46, is the daughter of King Harald V and fourth in line to the throne.
Their wedding was of keen interest in Norway; later the two wrote a book about the nuptials.
One crew member even said that Spacey "would put his hands on me in weird ways", including massaging his shoulders and touching his stomach.
In 2016, the Norwegian imperial court announced that Behn and the princess were to going to divorce, the first in the contemporary history of the Norwegian royal family. Last year, they chose to split but share custody over their three daughters.
Spacey's rep did not react to a request for remark from USA TODAY.
More and more men are coming forward and accusing former "House of Cards" star Kevin Spacey of sexual assault. Spacey checked into an Arizona luxury rehab center for sex addiction therapy last month.
However, Spacey then chose to use the statement to say: "I have loved and had romantic encounters with men throughout my life, and I choose now to live as a gay man". I honestly do not remember the encounter, it would have been over 30 years ago. Later, Spacey cornered him and touched him inappropriately.
His career has since taken a huge hit as a result of the allegations - he was sacked from his TV drama House of Cards and edited out of Ridley Scott's new movie All the Money in the World. And he is under unlawful investigation for suspected sexual assaults in both London and in Nantucket, Mass.
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