During the 1990s, Valletta reached the status of supermodel, working as the face of Giorgio Armani, Chanel, Escada, Louis Vuitton, Prada, Valentino, Gucci and Versace, and signing multimillion-dollar cosmetics contracts with Calvin Klein and Elizabeth Arden.Valletta, along with the likes of Kate Moss, Eva Herzigová, Tyra Banks, Carolyn Murphy and Shalom Harlow, was one of the most recognizable faces of the generation immediately subsequent to the original supermodels.[11] She has appeared on the cover of several international fashion magazines, such as Germany's Cosmopolitan and Glamour; Spain's Elle, Telva and Harper's Bazaar; UK's Esquire and Love and US' V, Porter, Interview, Ocean Drive, Shape, Allure, Marie Claire and i-D.[12][13] Valletta has walked in fashion shows for Versace, Lanvin, Louis Vuitton, Balenciaga, Gucci, Valentino, Prada, Michael Kors, Alberta Ferretti, Claude Montana, Dolce & Gabbana, Pierre Balmain, Sonia Rykiel, Versus, Yohji Yamamoto, Anna Molinari, Calvin Klein, Christian Dior and Tom Ford.Later that year, she played a supporting role in the thriller film What Lies Beneath, starring Harrison Ford and Michelle Pfeiffer and directed by Robert Zemeckis.In 2007, she had supporting roles in the horror film Dead Silence, as Ella Ashen, and as Claire in Premonition, starring Sandra Bullock.In 2011, Valletta was cast in the recurring role as the socialite Lydia Davis on the ABC television prime time soap opera Revenge.[23] In 2014, she was a regular cast member in the TNT crime drama series Legends, playing Sean Bean's character's ex-wife.[26] In 2016, Valletta starred in the video for Keith Urban's song "Blue Ain't Your Color", directed by Carter Smith.