Newly engaged Liam Hemsworth was joined by fellow actors Emma Roberts, Nikki Reed, Michael Angarano and Shenae Grimes on the set of Empire State in New Orleans, La., yesterday.  OK! GALLERY: NEWLY ENGAGED LIAM HEMSWORTH TAKES A SMOKE BREAK WHILE FILMING EMPIRE STATE  The film tells the story of two childhood friends who plan to rob an armored car depository, but get side-tracked by an NYPD cop (Dwayne Johnson) who stands in their way.  Read More >>