Directed by Lasse Hallstrom and based on the novel by best-selling author Nicholas Sparks, Dear John tells the story of John Tyree (Channing Tatum), a young soldier home on leave, and Savannah Curtis (Amanda Seyfried), the idealistic college student he falls in love with during her spring vacation. Over the next seven tumultuous years, the couple is separated by John's increasingly dangerous deployments. While meeting only sporadically, they stay in touch by sending a continuous stream of love letters overseas--correspondence that eventually triggers fateful consequences.

If you're wondering about the name of that haunting duet playing towards the end of the Dear John trailer, it's "Set the Fire to the Third Bar" by Snow Patrol, featuring Martha Wainwright on accompanying vocals. The Irish alternative rock band was also featured in another recent trailer for a romantic film, albeit of a different flavor, when their song "Just Say Yes" was featured in Leap Year, starring Amy Adams.

Here are the lyrics for "Set the Fire to the Third Bar"...

I find a map and draw a straight line
Over rivers, farms, and state lines
The distance from A to where you'd be
It's only finger lengths that I see
I touch the place where I'd find your face
My finger's in creases of distant dark places

I hang my coat up in the first bar
There is no peace that I've found so far
The laughter penetrates my silence
As drunken men find flaws in science
Their words mostly noises, ghosts with just voices
Your words in my memory are like music to me

CHORUS
I'm miles from where you are
I lay down on the cold ground
And I,
I pray that something picks me up
And sets me down in your warm arms

After I have traveled so far
We'd set the fire to the third bar
We'd share each other like an island
Until exhausted, close our eyelids
And dreaming, pick up from the last place we left off
Your soft skin is weeping, a joy you can't keep in

CHORUS x2