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David and Victoria Beckham are apparently "over the moon" after learning that their fourth -- and final -- child will be a girl!

Victoria, who already has three sons, Brooklyn, 11, Romeo, 8, and Cruz, 5, has made no secret of her longing for a little girl to join the Beckham brood and now it seems that she's gotten her wish.

"David and Victoria are over the moon," a source close to the family tells The Sun. "This will be their last child and to be told they are having a girl is the icing on the cake for the Beckham clan."

Posh and Becks learned of the happy news during a recent sonogram, where the doctor was finally able to identify the gender for the happy couple, who wept tears of joy at the news.

"Victoria is 36 and David is thinking about life after retirement. For them, with a sister for their boys - who are growing up fast - this is the perfect family," said the source. "All their dreams have come true. They couldn't have wished for more."

David and Victoria are expecting their little bundle of pink sometime later this summer.