Nicole Kidman puts marriage first

Nicole Kidman reportedly doesn't want to star in a film with her husband Keith Urban.

The actress is married to the country music star, who is also a judge on American Idol. It hasn't been confirmed whether Keith will be returning to the next series of the show and it is thought he is pursuing acting instead.

The US edition of Star magazine claims Keith has tried out for a role in a Universal Studios romantic comedy.

He allegedly asked his A-list wife to audition as his co-star in the hope he'd have more chance of landing the part.

The magazine reports that the 45-year-old actress refused Keith's offer, because she worries it might adversely affect their relationship.

"Nicole loves her husband too much to work with him on a movie," a friend explained to the magazine. "She wants him to pursue his dreams but is adamant about not working together."

Nicole and Tom Cruise divorced in 2001 after an 11-year marriage, having shot 1999 movie Eyes Wide Shut together.

The actress has expressed a desire to keep her professional life separate from her husband Keith's before.

During her stint as a judge at this year's Cannes Film Festival Nicole joked that Keith hadn't given her any judging tips.

"He's not given me any advice," Nicole laughed to USA Today.