Sunset Boulevard by Billy Wilder

Last night I watched an old film noir called Sunset Boulevard. It was directed and co-written by Billy Wilder. It was also co-written by Charles Brackett.
I absolutely loved it! I think it's my favorite film noir I've ever seen. It had very interesting visual ideas, and it also had a great story.

It was told in first-person from the perspective of an unsuccessful Hollywood writer names Joe Gillies who is played by William Holden. Out of luck and owing money to the bank, Gillies needs a place to hide his car from the bank collectors he is indebted to. He finds a seemingly abandoned mansion with an empty garage and decides to stash his precious car[go] there. He also plans to stay there until he doesn't have to worry about the bank. It soon becomes apparent that the house is not abandoned. It is, in fact, inhabited by an old silent-movie starlet named Norma Desmond, who Gillies says "used to be big". She responds with one of my favorite lines ever: "I am big, it's the pictures that got small."
Once Norma finds out that Gillies is a writer, she shows him a script she's been working on, which Gillies says is terrible. Norma, however, asks him to edit it and fervently requests for him to stay in the mansion with her. He obliges, but it soon becomes apparent that Norma has an obsession with him, with reliving her fame and youth, and with the movie industry. The movie documents her insanity and the insanity of Hollywood quite well, and is, in the end, very unsettling. I loved it.