In a press release from 20th Century Fox, director James Cameron said, "Audiences repeatedly told me they wanted more of Pandora, and wished they could have stayed there longer. So we're making that possible."
According to Cameron, the additional eight minutes will include new creatures and action scenes.
The Oscar and Golden Globe-winning film has taking in over $2.7 billion in worldwide box office. It's also the top-selling Blu-ray disc of all time.
According to the press release, the decision to re-release the film follows the increase in available 3D screens.