"Avatar" stars Sam Worthington and Zoe Saldana have officially signed on for three more films for the franchise.

According to The Hollywood Reporter, the "Avatar" film production will begin in October.  Director James Cameron will film all three movies consecutively.  The movie will take place in Pandora, but many of the plot details are being kept a mystery.  However, THR sources claim Jake Sully and Neytiri have children in the next film.

"Jake Sully is a rare combination of passion, strength, street smarts and soul, which requires a lot from an actor. Sam brought to the role a combination of sensitivity, vulnerability and strength. Zoe captured every aspect of the character I envisioned, bringing to Neytiri a mix of delicacy, fierceness and incredible physicality. I am beyond pleased they'll be returning with us to Pandora," Cameron told THR. 

The first "Avatar" sequel is slated for a December 2016, the second will be released December 2017 and last film will be out by December 2018.

According to the Huffington Post, it wasn't until August 2013 where Cameron decided there would be three additional franchise films instead of two.  The director reportedly felt there wouldn't be enough time in two movies to properly tell the "Avatar" story.

"It's going to be a lot of new imagery and a lot of new environments and creatures across Pandora," Cameron told The Associated Press in December. "We're blowing it out all over the place. At first I thought I was going to take it onto other worlds as well, in the same solar system, but it turned out not to be necessary. I mean, the Pandora that we have imagined will be a fantasy land that is going to occupy people for decades to come, the way I see it."

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