Nicole Kidman is at the Shanghai International Film Festival promoting her latest film, "Grace of Monaco".

The film follows the true story of the Hollywood actress Grace Kelly who gave up her film career in pursuit of love when she married the Prince of Monaco.

Speaking to CRI, Kidman, who plays Grace Kelly in the film, says she can understand why Kelly made that choice, "When I won the Academy Award, I was at the loneliest time of my life. And that's when it really hit me that I had to go and get a life because I gave so much to my creative life. I was so poor in terms of my family life. And that's when I said in my head. I really believe in setting the vision and saying ok. I remember saying now I want to find my soul mate because I got this and this. The Academy Award is not enough."

Kidman won a Best Actress Oscar for her performance in the film, "The Hours" at the 75th Academy Awards in 2003.

"Grace of Monaco" opened this year's Cannes Film Festival to very mixed reviews.

It focuses on the Hollywood star's crisis of marriage and identity in a dispute between Monaco's Prince Rainier III and France's Charles de Gaulle in 1962.

It's also about Kelly considering a return to Hollywood to act in an Alfred Hitchcock movie.

The film is out in the Chinese mainland this Friday (June 20) which also happens to be Nicole Kidman's 47th birthday.