Savannah Miller Confirmed Her Sister Sienna’s Pregnancy

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Sienna Miller. Photo: Pascal Le Segretain/2011 Getty Images/2011 Getty Images

After rumors of Sienna's pregnancy broke earlier this month, her sister Savannah made the news official in a brief interview with British Vogue today. "We are all really happy about it," she confirmed, continuing to say that Sienna's boyfriend, actor Tom Sturridge, "is an amazing guy."