(Agencies)
Updated: 2008-01-21 17:52

Hollywood superstar Tom Cruise's new biography reveals that his ex-wife Nicole Kidman has a difficult and emotionally strained relationship with her children, Isabella and Connor.

Pagesix.com quotes Andrew Morton, the book's author, as saying: 'Those who saw the family close up concluded that Tom was much more comfortable and enthusiastic as a parent. The actor was in constant and controlling touch with the youngsters and their nannies no matter how busy he was.'

Kidman had said in a TV show: 'My kids don't call me mommy, they don't even call me mom. They call me Nicole, which I hate and tell them off for it.' The biography is titled 'Tom Cruise: An Unauthorised Biography'.