Princess Charlene of Monaco and Prince Albert II have welcomed twins, a source confirms to Us Weekly -- find out their sex! Credit: Monaco Princely Pool/Palais Princier-P. Villard/SBM/WireImage

One of each! Princess Charlene of Monaco and Prince Albert II have welcomed twins, a baby boy and girl, sources confirm to Us Weekly. The couple named their children Jacques and Gabriella.

Princess Charlene (maiden name: Wittstock), 36, and the 56-year-old monarch confirmed back in May that they were expecting. In October, Us confirmed that the couple, married since 2011, were gearing up for double royal duty!

"[We're] taking every cautious step to make sure everything goes well," Albert II said of the pregnancy in June, via Daily Mail. "[We're] overjoyed [and] thrilled."

This marks Princess Charlene's first two children, and the fourth and fifth for Albert II. The son of Rainier III and the late Grace Kelly is already dad to daughters Jazmin Grace Grimaldi, 22, and Alexandre Coste, 11, from previous relationships.