LOS ANGELES: Nicole Kidman is refusing to work with husband Keith Urban.

Keith - whose future on American Idol is hanging in the balance - is pursuing acting. The 45-year-old country music star auditioned for a role in a Universal Studios romantic comedy and hoped to improve his chances of landing the part by getting Nicole, 46, as his costar, but she refused.

While Nicole supports Keith’s acting ambitions, she has zero desire to work with him because she feels her marriage to Tom Cruise began to unravel when they costarred in Eyes Wide Shut, a source said.

“Nicole loves her husband too much to work with him on a movie,” her pal explains. “She wants him to pursue his dreams but is adamant about not working together.”–SS