In a new Norwegian music video the royal spouse shoots down a journalist who once dubbed him "the son-in-law from hell"
Photo: © Rex
Ari and Kjetil Rolnes are good friends now, however, so when the journalist gave him the chance to "get his revenge" in the clip, Ari agreed
Photo: © Rex
It could be a scene out of a classic Western – pistols at high noon between the town's sheriff and a deadly stranger.
But suddenly the mysterious man pulls off his hat to reveal himself as Ari Behn, the writer husband of Norway's Princess Martha Louise.
The bizarre scene unfolds during a music video for the new song from Norwegian group the Penthouse Playboys.
But there's a story behind Ari's casting in the film – the 37-year-old and the man he's trying to kill in the video once had a very public falling out.
Kjetil Rolnes - the lead singer in the band - is also a journalist. Just after Ari and Martha Louise got together in 2001, Kjetil wrote an article in which he described Martha's new boyfriend as "the son in law from hell".
Ari was so incensed by the piece that he turned up at the newspaper office where Kjetl worked and challenged him to a fight, to settle their dispute.
It never took place, however, and the two men made up shortly afterwards. They have since gone on to become good friends.
So when Kjetl asked Ari if he wanted to get his revenge on his former foe in his new music video – a homage to Norwegian Western hero Morgan Kane - he jumped at the chance.
In the clip Marta's silver-haired husband is quicker off the mark during the duel, drawing his pistols and landing a fatal hit.
There's a happy ending, though. A kiss from a pretty blonde bystander brings Kjetl back from the dead, leaving Ari to slink out of town with his tail between his legs.