Naomi Watts is set to portray a cougar on the big screen in Grandmothers.
The Oscar-nominated actress could be teaming up with Robin Wright to play two lifelong friends who fall in love with each other's teenage sons, according to The Hollywood Reporter.
Australian actors Xavier Samuel, best known for his role in The Twilight Saga as vampire Riley, and James Frecheville are tipped to play the teenage boys.
Based on Australian Nobel Prize-winning author Doris Lessing's novel, it has been adapted for the screen by Oscar winner Christopher Hampton, with director Anne Fontaine to sit in the director's chair.
Naomi, who can be seen opposite fellow Brits Rachel Weisz and Daniel Craig in Dream House, will next star in Clint Eastwood's J Edgar alongside Leonardo DiCaprio and Armie Hammer.