Scholastic announced that over 50 million copies of Suzanne Collins's novels are in print, making them some of the best-selling books of 2012.
"It's thrilling to see teen and adult readers enthralled by the same story and engaged in conversation about these books," Scholastic chief Ellie Berger said in a statement.
There are 23 million copies of The Hunger Games currently in print, with 14 million and 13 million copies of its sequels Catching Fire and Mockingjay respectively.
The Hunger Games is leading Fifty Shades of Grey as the best-selling title of 2012. EL James's erotic novel has sold 20 million copies since the beginning of the year, while Collins's book recently passed the 26 million mark. (Note: these figures include e-books.)
Casting news for Catching Fire has been heating up over the past week, with Pirates of the Caribbean: On Stranger Tides star Sam Clafin reported to be taking on the role of Finnick.
Meanwhile, Amanda Plummer will play Wiress in the upcoming sequel.
The Hunger Games: Catching Fire is released on November 22, 2013.
Watch Jennifer Lawrence discuss the Hunger Games movie with Digital Spy below: