The first Hunger Games book in Suzanne Collins' trilogy will be in movie theatres from 23 March, although the London premiere will take place on 14 March. Catching Fire, book #2, will be in movie theatres starting in November, 2013.
Also, tie-in items (such as the 'movie edition' of the original book) have been out for some time, as this shows.
More than 88,000 fans are following the Facebook page. Many, many fewer are following the Twitter account. May the odds be ever in your favour.