Princess Charlene and Prince Albert II of Monaco are expecting twins

Forget the Duke and Duchess of Cambridge; there's about to be double trouble in another royal household.

Princess Charlene of Monaco and Prince Albert II are expecting twins, reports Hello Magazine.

In May, the Palais Princier confirmed Princess Charlene's pregnancy via Twitter, but failed to reveal that she was pregnant with two bundles of joy. The Palais has not officially confirmed the news, but several outlets are reporting that the twin news is indeed true.

During a recent visit to New York City, the 36-year-old royal, who is due by the end of the year, dished to Hello Magazine that she was feeling "absolutely great" about her first pregnancy.

Earlier this year, Prince Albert II revealed that he was taking every effort to make his wife's pregnancy comfortable. Prince Albert II, who is the son of Rainier III, Prince of Monaco and screen legend Grace Kelly, already has two children from previous relationships. His two children Jazmin Grace Grimaldi, 22, and Alexandre Coste, 11, while taken care of financially, are not eligible for succession to the throne.

Charlene has been looking forward to having children of her own for quite some time. In March she told Vanity Fair, "I want motherhood very much, but everything is in God's hands."

The former South African Olympic swimmer and her royal husband, 56, met at a swim competition in 2000. The duo married in a palatial ceremony in Monaco in July 2011.

We hope they're ready for a very full household!