Nicole Kidman has reportedly telephoned Katie Holmes to encourage her to go ahead with her wedding to Tom Cruise.Nicole, who was married to the 'Mission Impossible' actor for ten years, made the call after hearing that Katie was nervous about walking down the aisle with Tom.A source told Britain's Grazia magazine: "Nicole has made sure that she has told Katie how pleased she is they're getting married."She's alleviated some of Katie's worries about what it's like being married to Tom and urged her to go ahead with the wedding. Nicole usually minds her own business, but she made an exception in this case."'Cold Mountain' star Nicole got married herself this summer to country music star Keith Urban.Former 'Dawson's Creek' actress Katie - who gave birth to her and Tom's first child, daughter Suri, in April - is said to be nervous about marrying the 'Top Gun' star as her devout Catholic parents do not approve of his Scientology beliefs.The source added: "Nicole called Katie and they had a friendly chat, during which she said Tom had been a great, supportive husband for ten years and she shouldn't listen to any gossip about him that suggests otherwise."

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