Urban, 47, said life without Kidman would be like the challenging block-building game of Jenga.
Speaking during a question and answer session at Country Radio Seminar in Nashville, he said, "Someone said one time, 'If your marriage isn't your priority, you're not married'. And I thought, for me that's so true. So as long as I keep her as a priority, everything else sort of seems to work. And when I don't keep it as a priority, it's... Jenga."
The Australian hunk also revealed he would struggle to keep his schedule in order if his 47-year-old actress wife would not have been there with him.