Gerard Butler at the US Premiere of 300

The movie 300 looks set to become the year's biggest film so far after early Friday showings sold out across America. Tickets to see the warrior film - about a legendary battle between the Spartans and Persians - at IMAX's 57 supersize screen locations sold out throughout the film's opening day, and many multiplexes also saw a rush for early tickets. Box office experts predict "300" could storm to the ...