Now in its 54th year, the Sports Illustrated Swimsuit Issue is back once again to add some warmth to your winter. The 2017 edition is fronted by three special collector's covers showcasing Kate Upton, who returns to SI Swimsuit after a two-year absence. Also making a triumphant return: three-time cover model Christie Brinkley who hits the beach with her daughters. See more than 125 amazing photos from seven around-the-world locations featuring returning models Chrissy Teigen, Nina Agdal, Hannah Jeter, Hannah Ferguson, Bo Krasmanovic, Kate Bock, Robyn Lawley, Barbara Palvin, Rose Bertram, Samantha Hoopes and 2016 cover models Ashley Graham and Hailey Clauson. Meet the seven women who make up the 2017 rookie class and check out the four contestants vying for a place in the 2018 Swimsuit Issue in a nationwide model search. Go for the gold with Olympic gymnasts Simone Biles and Aly Raisman and view the power and beauty of tennis stars Serena Williams, Caroline Wozniacki and Genie Bouchard in special athlete portfolios.