SECRET’S OUT: Although a rain-soaked red carpet greeted the cast of “In Secret” at the film’s Los Angeles premiere, its two young stars managed to gracefully navigate the press line. Leading lady and resident “It Girl,” Elizabeth Olsen, paired a monstrous Forevermark diamond ring (the brand sponsored the ArcLight Theater premiere) with an ankle-length black Proenza Schouler dress and metallic silver Jimmy Choo shoes. The rising starlet commented on being the face of Miu Miu’s Spring/Summer 2014 campaign, saying, “It was an incredibly fun shoot; I really had a good time” and later joked about the perks of having famously fashionable siblings, saying, “When they will just give me anything from The Row I am a very, very happy customer.” Olsen’s co-star in the film, Tom Felton — aka Draco Malfoy in the Harry Potter films — walked the carpet in a Burberry suit alongside girlfriend Jade Olivia, who wore a light pink Chanel dress. Afterward, the cast headed to Aventine restaurant and social club for the after-party. The film, based on Émile Zola’s 1867 novel “Thérèse Raquin,” is set to hit theaters on February 21.