Green was initially announced as one of the 28 regional qualifiers for
Miss South Africa 2018 in April 2018. She later was able to advance to the televised competition as one of the top twelve competitors. During the final competition, Green advanced into the top five and then into the top two, where she was crowned Miss Universe South Africa 2018 by outgoing titleholder,
Demi-Leigh Nel-Peters, becoming the South African representative in
Miss Universe 2018. Afterwards, she was crowned Miss South Africa 2018 with Miss World South Africa being Thulisa Keyi. She was crowned by her predecessor Adè van Heerden. As Miss South Africa 2018, Green went on to represent South Africa at
Miss Universe 2018. During the final word round, each delegate was asked the same question: "What is the most important lesson you've learned and how will you apply it to your time as Miss Universe?" Green replied: ==Personal life==