Sundance Film Festival 2013

Actress Naomi Watts poses for a portrait during the 2013 Sundance Film Festival at Village at the Lift, Jan. 18, 2013, in Park City, Utah.

Watts stars in "Two Mothers," directed by French director Anne Fontaine, in which she and Robin Wright play lifelong friends who begin love affairs with each others' 18-year-old sons, played by Xavier Samuel and James Frecheville.

"I fell in love with the script because I felt like the characters were complicated," Watts said, "and just as I was about to judge them, I found myself forgiving them, because of the love between them."

Credit: Larry Busacca/Getty Images