in Mister World, National Winners Mister World Argentina 2017 is Thomi Lietti. by misterology August 19, 2017, 12:28 pm 7.4k Views The new Mister World Argentina 2017 is Thomi Lietti. The representative of Tierra del Fuego was chosen as the winner of the the contest Mister World Argentina. Thomi Lietti, will compete in the next edition of Mister World contest. See more Previous article Meet the Mister Estado de Mexico 2017 candidates! – regional pageant Next article Meet the 20 finalists of Mister Poland 2017.