Nicole Kidman and Katie Holmes may have never been friends, but now there be more of a reason for hostility between the two of them.

Recently, Australian Oscar winner revealed that her adopted children with ex-husband Tom didn't call her mom. "The Golden Compass" star laughed off the matter, saying, "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."

Now, Tom's new wife Katie has claimed that Isabella and Connor call her "mom".

The "Dawson's Creek" actress, who has a one-year-old biological daughter, Suri, with Tom, told Parade magazine, "[Tom's] first two children are incredible, really smart and kind. They call me 'Mom'. So Tom understands the female bond, and he loves it."

Since Katie first stepped out with Tom, in 2005, she has been pictured by Tom's side at various family commitments. The couple are regularly seen field-side at the teen's soccer games in Los Angeles.

Nicole, meanwhile, has been focusing on her new marriage to Kieth Urban and has been based Down Under filming the epic film "Australia" with director Baz Luhrman.

The red head beauty recently said that she was planning to buy property in Los Angeles so that she could be closer to her two children, who spend most of their time with Tom.

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