Yahoo! Movies has released the official full-length trailer to James Cameron's Avatar, which will hit theaters on December 18. The official website for the film has also been launched today, where you can take a look at new images, download wallpapers, take a look at the upcoming Avatar video game and much more. CLICK HERE to delve into this new website for yourself. Click below to watch this brand new official trailer for yourself.

CLICK HERE to watch the trailer High Definition QuickTime!

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Sam Worthington
Avatar Trailer Still
Avatar Trailer Still #2
Sigourney Weaver

CLICK HERE to check out 85 hi-res trailer stills.

Avatar stars Sam Worthington, Zoe Saldana, Sigourney Weaver, Michelle Rodriguez, Giovanni Ribisi, Joel David Moore, CCH Pounder, Peter Mensah, Laz Alonso, Wes Studi, Stephen Lang, Matt Gerald and will be released nationwide on December 18.