Bogart's performances in Classical Hollywood cinema films made him an American cultural icon. His breakthrough from supporting roles to stardom came with High Sierra (1941) and The Maltese Falcon (1941), considered one of the first great noir films. Bogart's private detectives, Sam Spade (in The Maltese Falcon) and Phillip Marlowe (in 1946's The Big Sleep), became the models for detectives in other noir films. His most significant romantic lead role was with Ingrid Bergman in Casablanca (1942), which earned him his first nomination for the Academy Award for Best Actor.