French gossip magazine Closer's appeal against a court injunction ordering it to hand over all forms of pictures of Prince William's wife Catherine sunbathing topless will he heard next April, a source said Friday.

The hearing will take place on April 24, 2013 at an appeals court in Versailles, west of Paris, the source said.

In September, a court ordered the magazine to hand over all images of the royal couple within 24 hours or face a 10,000-euro ($13,000) fine for every day's delay.

It also banned Closer from re-using the pictures in print or on its website and re-selling them, or else face additional 10,000-euro fines for each infraction.

After their debut in the French weekly, the photos of the Duchess of Cambridge sunbathing topless have appeared in magazines in Denmark and Sweden, Ireland's Daily Star and Italy's Chi, which like Closer is owned by former prime minister Silvio Berlusconi's Mondadori media group.

The pictures were taken when the royals were vacationing in southern France at a chateau owned by Viscount Linley, the son of Princess Margaret, the deceased sister of Britain's Queen Elizabeth II.