I have seen the movie at the Viennale a few years ago, where the audiences liked it. I liked it as well, Summer Phoenix performance still haunts me, that´s why I decided to write a comment.
The story unfolds in London around 1900, where a jewish girl decides to become an actress. She tries desperately to become one, but it isn´t before a man treats her badly that she realizes on stage, that she has talent and that she connects with the audience and emerges as a stronger human being.
There were certain reviews, were her performance was smashed, they accused her of being dull, not able to bring life to her character. I think that´s her strong point, that´s exactly what Esther Kahn should be and Phoenix makes a brave decision to make her Esther a rather boring girl. So her transformation at the end is more powerful than it could have been otherwise.
The cinematography is great, the images of London around the turn of the century are very dark and sad, you can see how unpleasant life was back then.
The only fault in my opinion is the length of the movie, you loose touch with the characters, after all it´s only about finding the actor in yourself, so there are no dramatic actions in the film. It´s Phoenix credit that we don´t loose the interest in the movie after the first hour.

A splendid example of how Hollywood could (and still can) take a masterpiece of literary fiction and stupidly foul it up.
In the case of "the Big Sky," writer Dudley Nichols and company arrogantly assumed they could improve upon a classic pioneer novel by the Pulitzer prize-winning author, A.B. Guthrie. In so doing, they removed the soul of the story and any edge and impact it may have had as a film adaptation.
The epic nature of Guthrie's book and the evolution of its main character, Boone Caudill, from a naive, Kentucky lad into a hardened and competent survivor/mountain man, has been replaced with a downscaled riverboat farce that bears little resemblance to the author's intent. In the movie version, Boone's presence is nothing except underwhelming.
Intriguing and even shocking plot elements that give Guthrie's novel impact and excitement have been removed for no apparent reason whatsoever. Most puzzling of all is the emphasis placed upon the Zeb Calloway character, who was an incidental, minor character in the book, only occupying a handful of pages. On the other hand, a very important and fascinating character, Dick Summers, the veteran pioneer, is missing altogether!!! It is also apparent that director Hawks decided the Zeb character in the movie, played by actor Hunnicutt, wasn't irritating enough. So Zeb/Hunnicutt was given a significant amount of time doing that obnoxious, voice-over narration that is the Hollywood short cut for incompetent screen writing, editing, and direction.
Some movies have actually improved upon the books upon which they were based (William Wyler's "Ben-Hur" is an excellent example). But this is horrible and depressing not only as an adaptation of a novel but as a film unto itself.
The story is dull and clichéd, and the characters - at least the ones that have not been edited out of the script - are just shallow and boring shadows of Guthrie's literary vision. And unfortunately, Kirk Douglas' star appeal, which could have helped lift this film, was scuttled by the milktoast role he was given.
If you can believe it, the film version of Guthrie's Pulitzer prize-winning sequel, "The Way West," also starring Kirk, is even worse.
In my opinion, "The Big Sky" further solidifies Howard Hawks' place as one of the most overrated, tepid directors in the history of cinema.