Due to being born on Christmas, natal in Portuguese, Guimarães' parents named her Natália. According to her parents, the choice of her second name is a tribute to Our Lady of Aparecida. She took a package of medals of the saint and use one of its as amulet at Miss Universe 2007 competition activities and telecast program. Natália was born with six fingers on her hands. She inherited a genetic :wikt:characteristic|characteristic called polydactyly from her father, a congenital physical anomaly in humans; these supernumerary fingers or toes do not cause any problems to the carriers. The characteristic was discovered by media reports. Prior to her current career, Natália had an audition for actress in Rede Globo's telenovela Estrela Guia, but her father forbade it in favor of modeling activities. Guimarães enrolled on the Pontifical Catholic University of Minas Gerais to study architecture, leaving after six semesters to focus on her pageants.
Pageantry
Guimarães, who began her modeling career at 15 years old and previously worked for Ford Models, also won the 2006 Top Model of the World International Pageant. However, she resigned due to her participation in Miss Universe 2007 and her runner up from the Philippines assumed the title.
Miss Brasil 2007
Guimarães represented the state of Minas Gerais at Miss Brasil 2007 where she beat out 26 other contestants from the states and the Federal District of Brazil, gaining the right to represent her country at Miss Universe 2007.
On 13 July, Natália attended the opening ceremony of the Pan American Games in Rio de Janeiro with Brazilian delegation and held the national flag at the occasion. The Miss Brasil titleholder also participated of reality TV Dança no Gelo on TV show Domingão do Faustão. Natália also recorded a special guest appearance at soap opera from Rede Bandeirantes, Dance Dance Dance. The episode with the beauty queen was broadcast on 12 November 2007 in Brazil and USA. She was also invited to be a Victoria's Secret model. In February 2008, Natália appeared as the Queen for samba schoolUnidos de Vila Isabel in the Carnival parade in Rio de Janeiro, Brazil. Later, she garnered a first important role in a telenovela, as Ariadne in Caminhos do Coração and in its sequel, , both aired on Rede Record. In 2009, Natália portrayed a minor role in Bela, a Feia, Record-Televisa partnership Brazilian version based upon Mexican La Fea Mas Bella. On this telenovela, Natália's character was found dead on a beach. Since January 2010, Natália is host of Belo Horizonte's segment of national morning newsmagazine Hoje em Dia. Due to this, she started studying journalism at PUC-MG, graduating in 2015. On August 8, 2013 Guimarães and longtime boyfriend Leandro Scornavacca of KLB fame welcomed twin daughters Maya and Kiara.
