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Brad Paisley's actress wife has laughed off reports suggesting the singer has been having an affair with fellow country star Carrie Underwood.

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Brad, who celebrated his 10th wedding anniversary with "Nashville" star Kimberly Williams-Paisley earlier this year, became the subject of a National Enquirer article last week amid false allegations he has been hooking up with Underwood behind their spouses' backs.

However, Williams-Paisley is confident there is absolutely no truth to the cheating claims.

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Laughing at the suggestion of infidelity, the actress tells, "Are you serious? Wow! I hope it helps our careers! That's all I can say."

Paisley and Underwood have become close friends over the years and reunited earlier this month to co-host the 2013 Country Music Association Awards for the sixth consecutive time.

Underwood is married to ice hockey star Mike Fisher.

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