It Will Rain" is a love ballad co-written and produced by Bruno Mars and his songwriting and production team, The Smeezingtons. Bruno described the song as "think of the darker side of love".
"It Will Rain" is featured in the end credits of The Twilight Saga: Breaking Dawn - Part 1. Mars said the tune was halfway done before he viewed an early cut of the film and, inspired by its characters, put together the finishing touches. Alexandra Patsavas, music supervisor for the "Twilight" films, said she picked Mars because the latest film centered on a wedding and, "Who more appropriate than Bruno Mars to write a timeless, classic wedding song?"[7]
The singer recalls having to literally turn off the radio when hearing his song "It Will Rain" (written for 2011's Twilight Saga: Breaking Dawn - Part 1) because of his displeasure with the track's final mix. "I felt like I was a mosquito singing," Mars says with noticeable agitation. "I don't want that to happen again."[8]