 She was discovered by Bruce Weber and quickly became one of the industry's most coveted models, shooting with photographers such as Karl Lagerfeld, Patrick Demarchelier, Annie Leibovitz, Arthur Elgort, Mario Testino, and Craig McDean for magazines such as "American Vogue", "French Vogue", "Harpers Bazaar", "Another", "Muse", "GQ", "French Elle" and "Italian Elle", to name a few.She has also been a spokesmodel for Lancôme since 2004 and done ads for Lancôme makeup, fragrance, and skin care worldwide.While she was modeling, Wiedemann attended graduate school at the London School of Economics (LSE), ultimately receiving her Masters of Science (MSc) in Biomedicine, Biosciences and Society in 2010.