Prince Harry is to introduce his girlfriend to his father.
The prince was seen kissing Cressida Bonas during a ski trip to Switzerland last week and wants to further prove he is serious about his romance by arranging a meeting between her, Prince Charles and his stepmother, Camilla, Duchess of Cornwall.
A source said: "They're very much 'the couple' and by making it public he has taken their relationship to the next level.
"They kept in touch by email while he was on duty in Afghanistan and he wrote her love letters. Since he's returned, it's gone from strength to strength.
"Harry's met her parents and they've planned dinner with his father Prince Charles and stepmother Camilla."
Harry and Cressida's romance cooled last August after the prince was caught partying naked in Las Vegas, but friends say his cousins Princesses Beatrice and Eugenie persuaded their pal to give him another chance.
The source added to Grazia magazine: "Harry's not prepared to let her slip away again and Beatrice and Eugenie told her that he regrets it and is mad about her."