'The Host' Exclusive: Saoirse Ronan's Sexy Smooch

Are aliens the new vampires?

Pics: Inside The Final 'Twilight' Premiere

Stephenie Meyer, the mastermind behind the Twilight series, is back with a brand-new, out-of-this-world saga come March 29, and ET has an exclusive new scene from The Host, plus interviews with stars Saoirse Ronan, Diane Kruger and Max Irons.

Click the video above for your first look!

Related: Is 'The Host' The Next 'Twilight?'

Helmed by famed director Andrew Niccol, The Host is based on Meyer's 2008 novel (by the same name) and follows star-crossed lovers (Ronan and Irons) struggling to survive in a world overcome by invading alien "souls."

The Host hits theaters on March 29, 2013.