Harman was born in Brisbane, Australia in 1993 to an American father and an Australian mother, Carrie, who formerly worked as a weather girl on the Seven Network.

When Harman was growing up, she lived between the United States and Australia, and at the age of nine she moved to Melbourne when her sister Brooke began working on television series Pirate Islands.

Harman finished high school at Brisbane Adventist College in 2010 and was accepted into the University of Queensland for an arts/Japanese course.

In August 2011, Harman joined the main cast of Australian television soap opera Home and Away as rebellious teenager Sasha Bezmel, the illegitimate daughter of Sid Walker.

[9][10] Harman announced her engagement to producer Andrew Brooks in July 2019,[11] and they married in California in January 2022.