Tiffani Thiessen and her husband welcome a baby girl

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For her next role, actress Tiffani Thiessen will play mommy.

Thiessen, known for playing vixen Valerie Malone on the original “90210,” welcomed a baby girl with husband Brady Smith on Tuesday.

Named Harper Renn Smith, according to People magazine, this is the first child for the five-years-married pair.

“She’s totally the den mother of the show,” said actor Matt Bomer, her costar on USA’s “White Collar.”

“She’s so organized and so loving and generous – that can only make her an absolutely amazing mom.”

-- Matt Donnelly

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