The latest celebrity ad for the iPhone 4S virtual assistant Siri features film director Martin Scorsese (Taxi Driver, Goodfellas) in the back of a yellow NYC taxi. The TV commercial follows previous ones starring Samuel L. Jackson, Zooey Deschanel, and John Malkovich. Scorsese uses Siri to reschedule appointments and utilize the ‘Find my Friends’ app while trying to navigate the morning traffic, demonstrating how useful Apple’s voice-controlled feature is. Check out the new ad below: