Olivia Vivian is an Australian artistic gymnast who competed in the 2008 Summer Olympics. After competing at the 2008 Olympics, Vivian competed for Oregon State University in NCAA gymnastics for four years. She also competed in the 2005, 2006, and 2014 World Championships.

She retired from gymnastics in October of 2016, and she joined Cirque Du Soleil.

Since 2017 she has been a regular competitor on Australian Ninja Warrior. In 2019 she became the only woman to make it to the Grand Final 2 years in a row. In 2020 she became the only female competitor worldwide to reach the second stage of Grand Final, and also finish 5 stages in a calendar year.