Pictures of the Desperate Housewives star frolicking in the waves have already been published by paparazzi staking out the luxury resort.
The 31-year-old and her French boyfriend are staying just meters along the timber boardwalk from Kidman and Urban's over-water villa at the St. Regis resort in Bora Bora.
The high-profile guests have sent the resort into high-security mode, with staff on jet skis regularly patrolling the perimeter of the resort to discourage paparazzi.
Kidman and Urban have been spending much of their time tucked away in their bungalow, which is equipped with a jacuzzi and private pool.
Meanwhile, Longoria and Parker have been seen regularly cruising around the island in one of the golf carts that guests at the resort use as transportation.
Kidman and Urban are expected to stay in Bora Bora until the weekend, before returning to their home to Nashville, Tennessee.
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