She's a total knockout with a super-toned bod, but Naomi Watts opted for a matronly, full-coverage bikini bottom while vacationing in Sydney, Australia on Sunday.

The 43-year-old star paired the retro look with a slightly sexier top, sunglasses and a hat. She was joined by her partner Liev Schreiber, 44, and their sons Sasha, 4, and Kai, 3.

She's not the only celeb with a preference for modest swimwear. Florence and the Machine frontwoman Florence Welch was spotted on the beaches of Rio De Janeiro, Brazil in a high-waisted black bikini and a red swimming cap earlier this month.