First Trailer! 'The Host' from 'Twilight' Author

Here's a first look at the sci-fi thriller "The Host," the highly anticipated film based on the bestselling novel by "Twilight" author Stephenie Meyer.

The film stars "Hanna" actress Saoirse Ronan as an alien who is part of an invasion that inhabits human "hosts." She takes over a captured human in an attempt to locate the last surviving free humans on Earth... and begins to empathize with them.

"The Host" is set to invade theaters 2013.