In January 2013, more than a year before the release of the film, Grace Kelly's children Prince Albert, Princess Caroline and Princess Stephanie of Monaco, issued a joint statement saying they had no association with the production. The family added that the film contains major historical inaccuracies and that director Olivier Dahan ignored their requests for changes.
In Sept. 2014, before the film's release in the US was sorted out, Nicole Kidman admitted in a BBC interview with Simon Mayo that the film had problems: "I did do my best and obviously it didn't work".
There are three different versions of the film: One cut from director Olivier Dahan that premiered at Cannes in 2014, another cut by writer/producer Arash Amel at the behest of the North American distributor The Weinstein Company and a third cut that was shown on Lifetime in May 2015.
Filming took place in 2012 and The Weinstein Company picked up distribution rights for the film at the European Film Market in 2013, with an aim for the film to be released during the holiday season the same year. Following editing disagreements the film was delayed to a theatrical US release in March 2014, before it was tentatively taken off schedule in order to be eligible as the opening film at the 2014 Cannes Film Festival.
The trivia item below may give away important plot points.
Alfred Hitchcock (Roger Ashton-Griffiths) mentions that for the male lead in his next film (Marnie (1964)), his producers have their eye on a young Scottish actor who has just made a spy movie with 'Cubby' Broccoli (Albert R. Broccoli). The Scottish actor he refers to is Sean Connery, the spy movie is Dr. No (1962). As in the film, the real Grace Kelly turned down Alfred Hitchcock's offer to star in Marnie, but the official reason given was that the people of Monaco did not want their princess playing a thief and love interest to Connery.