Kate Moss has left Pete Doherty heartbroken after leaving him out of her New Year's Eve plans.

The supermodel has agreed to chaperone Princesses Beatrice and Eugenie at a party in Phuket, Thailand tomorrow night. Eager to impress the girls' mother Fergie, Moss has ordered Doherty to stay home in fear that he could be a bad influence on the royal pair.

A source told the Daily Star: "Pete is devastated. He spent a lovely Christmas with Kate in the Cotswolds. And he's looking forward to getting married to her. But he's shocked his future wife would rather spend New Year's Eve with some royal teens instead of him.

"He had already booked a flight over there to surprise her. But Kate knows how his mind works and told him in no uncertain terms his presence would not be welcome."