Liev Schreiber and Naomi Watts with their sons, Sasha and Kai
Splash News Online
12/17/2013 AT 11:05 AM EST
The family that swims together, stays together.
Or so it seemed on Monday, when Naomi Watts
hit the beach with her partner, Liev Schreiber, and their two sons, Kai and Sasha.
Wearing an animal-print swimsuit, the 45-year-old actress showed off her toned physique as she splashed in the surf at Bondi Beach, in her native Australia.
In the snapshot, 5-year-old Kai and 6-year-old Sasha
wear rash guards as Watts holds on to a boogie board.
The actress recently starred in Diana
– a biopic about the late Princess of Wales
She recently told the U.K.'s Sunday Times
that she felt "torn" about portraying the icon.
"I do care deeply about how the princes feel, of course," she said of Prince William
and Prince Harry
. "I am a mum of two boys."