Michael Shannon (Revolutionary Road, a half-second in Jonah Hex) and Jamie Chung (Sorority Row) have joined Joseph Gordon-Levitt in David Koepp's bike-messenger thriller Premium Rush.  The movie centers on a New York City bike messenger (Gordon-Levitt) who accidentally comes into possession of a package that a dirty cop desperately wants.  THR reports that Shannon will play the dirty cop, who is "deceptively affable" but also possesses a violent temper.  Chung is in talks to play the lead female role of Gordon-Levitt's ex-girlfriend/"daredevil bike messenger who helps him outwit the cop."

A couple weeks ago, we reported that Dania Ramirez (Heroes) was going to star opposite Gordon-Levitt.  THR doesn't say if Ramirez dropped out of the film or if she's playing another leading female character.  If there are multiple female leads, I have no problem believing that all the ladies love Joseph Gordon-Levitt.