LGAvatar has just released the very first clip from James Cameron's Avatar, which will be released in theaters on December 18. Click below for this thrilling new clip featuring a Thanator giving chase to Sam Worthington in his Na'vi.

USA Today has also posted a new photo of Zoe Saldana as Neytiri. Check it out below.

Related: Michelle Yeoh Joins the Avatar Sequels as Dr. Karina Mogue

Zoe Saldana as Neytiri

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 in theaters on December 18.