The first teaser trailer for The Host, based on the novel by The Twilight Saga's author Stephenie Meyer, and starring Saoirse Ronan has been released.

Watch the official trailer here:

Author Stephenie Meyer (who created the Twilight Saga) published the romantic science-fiction novel The Host in 2008. The sci-fi thriller is the story of a young heroine among an alien race that invades earth and inhabits humans, but she fights to keep control of her mind and spirit.

As the film is not set to be released until 2013, there is little footage in the mysterious trailer, but its release is timed to coincide with the opening of The Hunger Games, another dystopian fantasy based on a young adult book.

In the trailer Ronan is seen with a glowing halo in her eyes. Her voiceover says, "The earth is at peace", and "The world has never been more perfect", adding, "It is no longer your world".

Directed by Andrew Niccol (In Time) who also wrote the screenplay, it co-stars Diane Kruger (Inglourious Basterds) and William Hurt (Into the Wild).

The Host is set to hit theatres on March 2013.