Nicole Kidman, Keith Urban daughter Faith is "doing great"

Keith Urban has revealed that he and wife Nicole Kidman are having fun raising their two daughters.

Urban explained that the couple's 3-year-old Sunday Rose is getting along very well with her 9-month-old sister Faith.

"Faith is doing great and Sunday is as normal as it gets with regard to recognising that there is this new entity in the house," the singer told Reuters. "We keep reminding Sunday she's got a very important job as a big sister. She's been taking to that and realising that Faith really needs her to be her big sister."

Urban also commented that he and Kidman weren't originally planning to have more than one child.

"It felt very complete with Sunday and had she been the only girl we'd be thrilled. But it's nice that Sunday's got a sibling," he added.

"Nic grew up with a sister and I grew up with a brother. There's something comforting for both Nic and I to know they've got each other."

Urban, Carrie Underwood and Rascal Flatts to will headline the 'Bayou Country Superfest' concert series next May.

> Keith Urban accused of attacking photographer's car
> Keith Urban 'planned tour around family'

Watch Keith Urban perform 'You'll Think of Me' below: