Movies about Movies

Ah, the magic of film. Could anything be more comical (or vain) than films about film?

Adaptation
Auto Focus
The Aviator
Barton Fink
The Big Picture
Boogie Nights
Bullets Over Broadway
Celebrity
Cinemania
Ed Wood
Gods and Monsters
Last Action Hero
The Last Shot
Living in Oblivion
Lost in La Mancha
The Majestic
The Player
Shadow of the Vampire
Singing in the Rain
A Star is Born
State and Main
Sullivan’s Travels
Sunset Boulevard
The Stunt Man
Swimming with Sharks