Kate Middleton, Prince William Take Babymoon Vacation in Mustique

Kate Middleton and Prince William Credit: Getty (2)

Let the royal babymoon commence! Pregnant Kate Middleton and Prince William have escaped the dreary weather in London fora holiday on the ultra-exclusive island of Mustique, a Middleton family source confirms to Us Weekly. Kensington Palace had no comment. (British paper The Sun first broke the story.)

Expecting their first child together, the Duchess, 31, and William, 30, are kicking back in a luxury villa with a $30,000-a-week price tag. The couple (who honeymooned in the Seychelles following their April 2011 nuptials) flew out to the island a few days ago to join Kate's parents, Carole and Michael Middleton, the source adds.

Some perks of the royal parents-to-be's vacation villa? An infinity pool, games rooms and a private terrace. With Middleton completely recovered from the acute morning sickness that plagued the earliest days of her pregnancy, the twosome are ready to party -- with plans to hit Basil's Bar on Wednesday (Feb. 6) for a "Jump Up" party.

Middleton's child is due in July.