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The Oscar winner is not only refusing to speak out on her ex-husband's marital troubles, but she's allegedly avoiding even good friends, so she won't wind up quoted in the media swirl surrounding Cruise and Holmes' surprising split.
"Nicole won’t talk, wants her privacy, wants to be left out of this and they (she and Cruise) don’t speak much," a source told FOX411's Pop Tarts column. "Communication between her and Tom is very limited."
Kidman, 45, was married to Cruise for 10 years before he initiated their divorce in 2001 -- only two months after they had renewed their vows. After their split, the couple's two adopted children Connor and Bella decided to stay with their father.
More than 10 years later, Kidman is happily married to Aussie country star Keith Urban, with whom she has two young daughters.
"Nicole really does not want to be dragged into this or say anything to anyone," continued the source. "At some point though, she will probably be forced to say something, and she will most likely support Tom for the sake of their children."