sam worthington zoe saldana in avatarWith resume builders like 'Aliens,' 'Titanic' and a couple 'Terminators,' there's no denying that James Cameron has only himself to beat in a battle of epics. And he's on track to do just that as his decade-long vision of a 3D 'Avatar' comes to fruition on December 18. One thing's for sure, the film's leads, 'Terminator Salvation''s breakout star Sam Worthington and 'Star Trek' beauty Zoe Saldana, are an automatic win as far as we're concerned. avatar zoe saldana sam worthington photoWith resume builders like 'Aliens,' 'Titanic' and a couple 'Terminators,' there's no denying that James Cameron has only himself to beat in a battle of epics. And he's on track to do just that as his decade-long vision of a 3D 'Avatar' comes to fruition on December 18. One thing's for sure, the film's leads, 'Terminator Salvation''s breakout star Sam Worthington and 'Star Trek' beauty Zoe Saldana, are an automatic win as far as we're concerned.

Australian actor Sam Worthington made a splash when he starred in 'Terminator Salvation,' stealing the omnipresent spotlight from media-target Christian Bale with a convincing turn as Marcus Wright. In 'Avatar' he'll play Jake Sully, an ex-Marine-turned-Avatar (seen above) whose purpose is to infiltrate an alien village. Increasing demand for Worthington cements his status as one of sci-fi's hottest commodities. Oh, and he ain't too shabby, either.

Zoe Saldana found her sci-fi calling in a career-changing role as Uhura in Summer '09's smash hit 'Star Trek.' The stunning actress is fitting as 'Avatar''s Na'vi princess Neytiri (seen above), who forces Sully to question his destructive mission. Saldana will next star in a handful of films throughout scattered genres before returning to the space odyssey in a 2011 'Trek' sequel.

In anticipation of what is sure to be this holiday season's monster hit, Saldana and Worthington will be taking part in an Unscripted interview using fan questions. Ask them anything you'd like, just make sure it's before Wednesday, Dec. 9 and that you include your first name and the city you live in. Come back here on Wednesday, Dec. 16 to see if your question was asked!

Watch the 'Avatar' trailer:

More 'Avatar' trailers & clips