The swimwear featured thin straps that accentuated her toned biceps and shoulders.
Fox hosted a 57th birthday celebration for herself at her new home in Los Angeles and shared gorgeous pics and videos from the bash.
The one-piece fit snugly around her midsection and was cut high over her hips.
Some green foliage and a sandy beach were also visible in the distance as the clear, blue ocean surrounded the boat.
The talented star back in Dec.
In the background of the pics, a sunlit sky with white, fluffy clouds could be seen.