Answer
"The Maltese Falcon", a classic film noir released in 1941, stands as Mary Astor's most iconic cinematic achievement. Directed by John Huston and based on Dashiell Hammett's novel, the movie showcased Astor's talent as she skillfully portrayed Brigid O'Shaughnessy, a cunning and alluring femme fatale whose presence ignites a chain of cryptic events, deceit, and crime.