Tara Thaller was born in 1998, in Zagreb, Croatia, as Tara Filipovic, and was raised in a family with five siblings. Thaller was her great-grandmother's maiden name and Tara first used it informally on social media sites, but, after her first movie role, she decided to officially change her last name to it. In 2017 she finished high school and tried to enter the Academy of Dramatic Art in Zagreb, but failed. She started working in a fast food chain and preparing herself for next year's entrance exam, but all that stopped when she got the lead role in HBO's TV series Uspjeh (Success). From the age of six, Thaller is a vegetarian. She speaks English and some German and French, she plays piano and knows how to dance. She has trained skiing, swimming and horseback riding.