The 27-year-old prince, also an Apache helicopter pilot for his country's air force, was seen hugging Anna Solheim, the wife of polar adventurer Inge Solheim, The Sun reported.
Anna, in her early 30s, cuddled Harry in the car park of a trendy restaurant in Venice area of Los Angeles.
The report, however, said there was no suggestion Anna "is anything more than friends" with Harry, who is a close friend of her husband.
In April, the model had joined her 37-year-old husband and the prince before their polar trek.
A few days ago, several explicit pictures were released on US website TMZ, where the prince is seen completely naked after a game of strip billiards, hugging a naked woman, and showing his bare bottom to the camera while spending a raucous holiday in Las Vegas.
Harry was seen hiding his modesty with his hands, and the mystery nude woman is seen hiding behind him.
Another photo shows a naked Harry bear-hugging a nude woman with his bare bottom facing the camera.
The grainy shots were reportedly taken on a fellow reveller's mobile phone in his suite at the five-star hotel.
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