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Yup, Kate is back in her bikini -- ensconced with her man on one of the 115 islands in the Seychelles!

After furious speculation in the British press and around the world, Prince William and wife Kate are indeed honeymooning in the Seychelles islands, an insider confirms to Us Weekly.

Long before marrying and becoming the Duke and Duchess of Cambridge 11 days ago, William, 28, and Kate, 29, went on a romantic getaway to the Seychelles' Desroches island back in August 2007.

According to The Guardian, the Seychelles tourist office confirmed that the royal couple arrived at the international airport on Mahe Tuesday morning -- bound for one of the 100-plus islands in the archipelago, located in the Indian Ocean off the east coast of Africa.

One potential island? "The ultra-exclusive" Fregate Island Private, The Guardian speculates, which is just a 20-minute helicopter ride away from where William and Kate touched down.

PHOTOS: William and Kate touring their home turf pre-wedding

Fregate is a scant mile in length and less than a mile wide and features seven beaches, lush tropical flora and rare wildlife -- including a colony of giant tortoises!

"We are not confirming locations or commenting on any speculation on where they may be going for their private honeymoon, but we can confirm that they have left," a St. James Palace rep explained in a statement.

Seychelles would make sense for the pair, who've been famously photographed soaking up the sun and surf in luxe locales like Ibiza and elsewhere. "They're both very sporty," royal watcher Katie Nicholl tells Us. "They love being outside."