Urban: Kidman duet for us only

Keith Urban has revealed that he and Nicole Kidman will not release a duet together.

The musical couple may sing together at home, but the American Idol judge admitted they have no plans to collaborate together in a professional capacity.

"I think the only one that you can find is on YouTube when we inducted sort of Simon Baker into the Good Day USA Hall Of Fame. We put a little song together and we both sang that for him, but past that, no, I think nothing professional. We just enjoy singing at home," he said.

Keith, who sits on the judging panel of the US singing show alongside Mariah Carey, Nicki Minaj and LA Reid, said their two daughters Sunday and Faith have grown up around music and film.

"Nic and I love them being around that kind of environment, watching people sing, watching them perform and being around the music. They're certainly music fans. They haven't watched the show yet, but I have a feeling they will be this season," he said.

"It certainly won't be through lack of access to it all. We have instruments around the house and I sit at the piano and play with both the girls."

The country singer revealed that he has watched the show with Nicole.

"Sometimes we've sat down and watched it. We would sit down to watch the audition shows and Nic would be wanting to know, 'Does he go through? Does she go through?'," he recalled.

"It was actually good to watch it like that because I'd gotten a bit of time away and getting to see them and hear them like that was great. Nic is always curious if I've seen somebody that stands out."

:: American Idol is shown on 5*.