Nicole Kidman was'touched' by Keith Urban song

Nicole Kidman was "touched" when her husband Keith Urban wrote a song for her.

The 41-year-old musician and his writing partner Rick Nowels penned the heartfelt track 'Thank You' - which includes the lyrics 'I thank God for grace and mercy, and that you became my wife' - and revealed Nicole was thrilled when she first heard it.

Keith said: "Rick's music pulled this story out of me, which became quite a confessional - much more intimate than I might have written had I intended to write about her. It was very instinctual and very much from the heart. We did a quick recording of it, and I took it home and played it for her that night. I think she was very touched."

The song is included on Keith's new album 'Defying Gravity', which the singer describes as "up and joyous".

Nicole, 41, and Keith - who married in 2006 and have eight-month-old daughter Sunday Rose together - spend most of their time at their Nashville home, where they can keep a low profile.

He added to the USA Today newspaper: "We live in a place a bit too desolate, and we know too many back roads.

"We can just get out and do normal stuff. We really appreciate being able to go to a restaurant, go to the movies, just anywhere, any time. It's such a blessing for us to be able to do that."