Singer/actress Alicia Keys loved her intense training regime for the film “Smokin Aces,” so much, she decided to keep working out and train to run a marathon in Greece.

The singer makes her big screen debut in the film playing a tough hit woman out to kill a sleazy magician played by Jeremy Piven. She explains, "It kind of started with Smokin' Aces, because I was training in a way that I'd never trained before. "I just kind of woke up and thought, 'I want to run a marathon.' "So we started preparing for it and I did! It was the weirdest sensation. It was pretty long - it took me five hours!"

Here's a few pictures from the premiere of Smokin' Aces.