Hollywood Nicole Kidman says she puts her marriage to country singer Keith Urban before everything else in her life.

The actress plays a woman whose marriage is collapsing in new movie Margot At The Wedding, but Nicole - who has two children with ex-husband Tom Cruise - says her own relationship comes first in real life.

"Married life comes first and everything else comes second," she told People.com at the New York premiere of the new film.

However, Kidman has had to endure her husband having an extended stint in rehab for alcohol problems since marrying Urban in June of last year.