Behind Rachel & Channing's 'Vow' Chemistry

On paper, pairing The Notebook's Rachel McAdams with Dear John's Channing Tatum was a match made in weepy movie heaven. In reality, their electric chemistry was better than fans expected.
But what went into making The Vow's leading lovers so magical? That's one of the aspects dissected in a featurette on the DVD and ETOnline has an exclusive sneak peek at the interviews. Watch!
The Vow hits DVD on May 8, click here to pre-order.