Watch! Nicole Kidman dishes out marriage advice: 'Happy wife, happy life'

Keith Urban sure has his hands full.

During an interview on The Project, Nicole Kidman revealed that her secret to a good marriage is a "happy wife." Watch above.

And to think we thought the key was a whole lot of PDA! See the 47-year-old making out with her husband-of-eight-years on the red carpet of the Paddington premiere in the slideshow below...

Paddington hits Aussie cinemas on December 11. Check out the trailer below and vote 'want to see' or 'not interested' over at MovieBuzz.

View slideshow: Nicole and Keith's red-carpet PDA