Catherine Zeta-Jones sent her fans into a tailspin when she shared an extremely rare photo with her parents, Patricia and David to mark their 55th wedding anniversary on Friday.MORE: Catherine Zeta-Jones stuns in dramatic lace gown in celebratory photo with rarely seen brotherThe Rock of Ages star looked gorgeous in the throwback snap she shared on Instagram, posing in-between her parents in a sparkling figure-hugging frock, while dad David looked smart in a suit and mum Patricia screamed