Madeleine McCann 's twin siblings, Sean and Amelie, have lived most of their lives under the long shadow of one of the world's most haunting mysteries. Now 20, RadarOnline.com can reveal the pair have quietly emerged as accomplished young adults – carving out their own paths while preserving the hope that has defined their family since Madeleine's disappearance in 2007 .

When Madeleine vanished from a holiday apartment in Praia da Luz, Portugal, her brother and sister were only two years old, asleep in the same room. Article continues below advertisement

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In the 17 years since, parents Kate and Gerry McCann have f

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