You've seen Siri chat with Zooey Deschanel, Samuel L. Jackson and John Malkovich; now she's helping out a genuine New York film auteur in the latest commercial for the iPhone 4S. Martin Scorsese stars in this ad, and delivers his trademark rapid-fire patter from the back of a taxicab. (Scorsese? Taxi Driver? Get it?)

This isn't Scorsese's first go-round as pitchman, either; he starred in a memorable American Express ad that mocked his directorial perfectionist tendencies.

The ad is embedded below.

Thanks Sean