Olga was born in Nicosia, Cyprus on 28 July 2006, the younger of two children of Maya and George Petsas. The family moved to Vancouver-BC before her 10th birthday. Olga speaks basic Serbian and is fluent in Greek. In addition to acting, Olga has particular interest in Psychology and in May 2020 she completed successfully the online course "Introduction to Psychology", offered via Coursera and authorized by Yale University.