New trailer for I Am Number Four amps up the teen alien action

The first trailer for I Am Number Four, starring Alex Pettyfer as a teen alien on the run, teased us with but the barest outline of the plot and just a small glimpse of the action. But now we're getting a full-length look that gives us more of an idea of what to expect—and that includes lots of explosive alien combat!

Check it out below and let us know what you think.

I Am Number Four will hit theaters Feb. 18, 2011.

(via Yahoo)

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