St James's Palace has released the following statement:
"St James's Palace confirms that legal proceedings for breach of privacy have been commenced today in France by The Duke and Duchess of Cambridge against the Editor and Publishers of Closer Magazine."
The Duke and Duchess of Cambridge have condemned the publication of photos to the topless Duchess, while sunbathing in Provence last week, as a "grotesque invasion" of their privacy.
The Duke and Duchess spent several days at the "plush villa" owned by Viscount Linley, the son of the late Princess Margaret. Chateau D'Autet, near Viens, is "set in 640 acres of rolling countryside and surrounded by fields of lavender."
The editor of the magazine, Laurence Pieau, defends her decision to publish the photos.
There's been an over-reaction to these photos. What we see is a young couple, who just got married, who are very much in love, who are splendid. She's a real 21st century princess. It's a young woman who is topless, the same as you can see on any beach in France or around the world."
"These photos are not in the least shocking. They show a young woman sunbathing topless, like the millions of women you see on beaches. It's still on the Internet. That shocked no-one."
Pieau defended her actions by saying that "where Catherine was pictured sunbathing with her husband was clearly visible from the road."