Toning up her slender frame, Naomi Watts joined alongside her trainer for a private workout in Sydney, Australia on Wednesday (March 21).
Sweating it up in a messy bun, the "King Kong" actress worked out her arms with dips, a medicine ball and dumbbells while looking sporty in a bright pink top and black spandex.
Currently, Watts has been busy filming one of her many upcoming movies titled "The Grandmothers," which follows a pair of childhood friends and neighbors that fall for each other's sons.
Directed by Anne Fontaine while co-starring Robin Wright and Xavier Samuel, the drama is slated to hit theaters in 2013.
Enjoy the photos of Naomi Watts working out in Sydney, Australia (March 21).
Photo Credit: FameFlynet.com