Why is Julia Roberts a perfect party girl?

 "You haven't hung around with her," Hanks joked when asked why he thought of Roberts for the role while penning the movie's script. "Look at the way this woman makes a Margarita! That's a different sort of drunken school teacher. There's stuff behind that," he told eonline.com.

The romantic comedy, releasing July 1, is about a a middle-aged man Larry Crowne  (Hanks)  who decides to go back to college after losing his job and there he develops an unexpected crush on his teacher Mercedes Tainot (Roberts).

Roberts is upbeat about her role and said: "It's the most fun thing anyone has asked me to do on camera. Play a drunken school teacher. Isn't that awesome?"