Hollywood super star Nicole Kidman is reportedly to marry her boyfriend, country music singer Keith Urban, in a Catholic church in Sydney on June 25.

But Kidman's publicist has refused to comment on "speculation on wedding dates."

The couple has been dating for about a year, but has declined to confirm their relationship until they publicly held hands at last month's Grammy Awards.

Although yet to formally announce the engagement, Kidman has been flashing a huge diamond on her ring finger for months.

The news of the wedding follows reports that the "Cold Mountain" stunner was told that she would be able to get an annulment of her marriage to Tom Cruise, also a Hollywood super star, on the basis that it did not conform to the requirements of the Catholic Church.

Editor: Donald