The 34-year-old younger brother of Albert's wife Princess Charlene exchanged vows with Roisin Gavin in a quiet civil ceremony on Thursday (03Sep15), officiated by Monaco Mayor Georges Marsan at the principality's city hall.

Sources tell Monaco Matin newspaper the newlyweds, who have a young daughter, plan to celebrate their nuptials this weekend (04-06Sep15) at the Grand Hotel Saint-Jean-Cap-Ferrat.

Wittstock, who lives in Monaco, is godfather and uncle to Prince Albert and Princess Charlene's daughter Princess Gabriella.

The latest Monaco high-society wedding comes less than two months after Princess Caroline's son, Pierre Casiraghi, exchanged vows with Italian heiress Beatrice Borromeo in July (15).