Miss South Africa 2019 and
Wishnutama Kusubandio in
Jakarta. Tunzi began her pageantry career in 2017, when she was accepted as one of the top 26 semifinalists of
Miss South Africa 2017. She returned to pageantry to compete in
Miss South Africa 2019. On 26 June 2019, Tunzi was confirmed as one of the top 35 semifinalists of the competition, among initial applications. After further auditions, Tunzi was announced as one of the sixteen finalists on 11 July. After being selected as one of the finalists, Tunzi went on to compete in the Miss South Africa 2019 pageant in
Pretoria on 9 August. She progressed through the stages of the final, advancing to the top ten, then top five, and finally the top two until she was crowned the winner by predecessor
Tamaryn Green, beating runner-up Sasha-Lee Olivier. Following her win, Tunzi received prizes including
R1 million, a new car, and a fully furnished apartment in the
Sandton neighbourhood of
Johannesburg, which is valued at R5 million, for her to use throughout her reign. The achievement allowed Tunzi to represent South Africa at the
Miss Universe 2019 competition. She competed in the preliminaries on 6 December, and competed in the finals on 8 December at
Tyler Perry Studios. During the competition, Tunzi advanced to the top twenty as the first semifinalist for the Africa/Asia-Pacific continental region. She then advanced to the top ten, then the top five, and ultimately the final three. By the end of the event, Tunzi was crowned Miss Universe 2019 by outgoing titleholder
Catriona Gray of the Philippines, beating first runner-up
Madison Anderson of Puerto Rico and second runner-up
Sofía Aragón of Mexico. Tunzi's win is South Africa's third
Miss Universe title; she is the first black woman to win the Miss Universe title since
Leila Lopes was crowned
Miss Universe 2011, and the first to do so with
afro-textured hair. With her win, 2019 became the first year that all four major United States–based pageants were won by black women; other titleholders were
Nia Franklin (
Miss America 2019),
Kaliegh Garris (
Miss Teen USA 2019), and
Cheslie Kryst (
Miss USA 2019). Additionally, 2019 would also become the first year that black women won the two most prestigious
international pageants after
Toni-Ann Singh of Jamaica later won
Miss World 2019. As Miss Universe, Tunzi lived in New York City, and took part in a number of events and appearances throughout the world. After winning Miss Universe, Tunzi was succeeded as Miss South Africa by her first runner-up Sasha-Lee Olivier. In her capacity as Miss Universe, Tunzi traveled to
Sumba and
Jakarta in Indonesia, various cities within the United States and her home country of South Africa. Due to the
COVID-19 pandemic, Tunzi became the longest reigning Miss Universe titleholder, holding the title for a total of 525 days (), surpassing
Leila Lopes's reign of 464 days. Tunzi's reign came to an end on 16 May 2021 when she crowned
Andrea Meza of Mexico as her successor at the
Seminole Hard Rock Hotel & Casino,
Hollywood, Florida, United States. == Personal life ==