When shooting was about to begin in May 1949 Montgomery Clift got cold feet and checked out. Clift had a private relation with an older woman at the time and was afraid that this was to be used against him in some way. William Holden was thus more or less thrown in at the last minute. With only a third of the script ready when shooting began it is my firm belief that Gloria Swanson was instrumental for the plot and that she agreed to share many details from her real life and career. The fact that so many things, lines and even props seems to come from Gloria herself, at least I believe it does, gives the movie an eerie documentary feel. I am also quite sure that Erich von Stroheim who plays Max, Norma Desmond's butler was chosen because of his earlier relation to Swanson and that it was Swanson herself who came up with his name as some sort of gesture, because she once had fired him from Queen Kelly, effectively ending his career (and her own). It is no coincidence that the movie that is projected in Norma Desmond’s private cinema is the infamously unfinished Queen Kelly from 1929 the only film that Swanson starred in that was directed by Stroheim. I know that the inclusion of the images from it definitely came from Swanson. Every single reel of Queen Kelly was property of Swanson's. The images from it shown in Sunset Boulevard are the first that were ever seen by a large audience in the US since the movie only had been released in a severely shortened European version in 1931. Another interesting detail worth mentioning occurs when we get a good glimpse of Cecil B. DeMille at work at the Paramount lot. He was the director that more or less discovered Swanson and his nickname for her in real life was “Young Fellow”, a nickname he naturally use when he meets Norma Desmond on the set in the movie.
von Stroheim's history is very speckled. When he got kicked out in the cold from Queen Kelly in 1929, he had directed his last big picture and was from then on degraded to acting only. His talkie career consists almost entirely of strange parts as Germans or bizarre evil characters in movies made all over the world during the 30's and 40's. His best role from those years is without hesitation his brilliant Captain Rauffenstein in Renoir's La Grande Illusion in 1937.
All these details makes Sunset Blvd. a very strange and beautiful Film Noir and with its documentary references it becomes a multi faceted black diamond that will never fall out of fashion. Sunset Blvd. is cynical about everything to do with the movies, the business, fame and the cynicism of William Holden’s hard boiled narration. Everywhere it looks, it sees the damage that stardom can do and how people are willing to exploit each other to get it. That’s probably what makes it one of very few timeless movies, as relevant to the present day film industry as it was in 1950. You can’t leave Sunset Blvd. without mentioning Gloria Swanson’s superb performance. The role as Norma Desmond demands a broad performance, even alone within the walls of her mansion she's over the top. But using big gestures and broad manners and not going past the line where acting descends into unintentional comedy is a delicate balancing act which she pulls off almost effortlessly, especially when you consider that she really hadn’t worked since the early thirties. The role as Norma Desmond is without a doubt Gloria Swanson’s finest achievement, possibly also Billy Wilder's.