Kevin Mazur/WireImage; Steve Granitz/WireImage
What do Gwyneth Paltrow, Sofia Vergara, Octavia Spencer, and Jennifer Garner have in common? They're all turning 40 this year! In fact, there's quite a few leading ladies in Hollywood set to blow out four-decades worth of cumpleaños candles in 2012. Click through the gallery to see who was born in 1972!
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