United Kingdom, July 28 -- Naomi Watts has sent birthday wishes to her "divine and adventurous" son Sasha.

The 57-year-old actress took to Instagram to commemorate her eldest child's 19th birthday over the weekend by sharing a selfie that he had taken with the sun setting behind him in the background.

Naomi - who also has daughter Kai, 17, with her former partner Liev Schreiber - captioned the post: "Happy birthday to my divine and adventurous loving son. So proud of you @sashapeterschreiber."

The Impossible star and Ray Donovan actor's 11-year relationship came to an end back in 2016, but the former couple have been open about putting their children first by maintaining a strong friendship.

Naomi, who married actor Billy Crudup in 20...