Trentini dated photographer Victor Demarchelier, son of legendary French photographer Patrick Demarchelier for about three years. Immediately after breaking up with Demarchelier, in early 2010, she got back together with Brazilian photographer Fabio Bartelt, who was her first boyfriend. On 29 October 2011, both Trentini and Bartelt announced they were engaged. On 3 March 2012, Bartelt and Trentini were married on a church in Itajaí, Santa Catarina, Brazil.
