Tju was born in Southern California. Her sister is named Brianne Tju.
Trivia
Her first appearance on television was a commercial for Pizza Hut, while her first TV show performance was a bit part in Hannah Montana, at the age of seven.
Her first prominent role was as a voice actor in the children's animated series Monsters vs. Aliens, as the character of Sqweep. Next, Tju landed her first leading role in the Nickelodeon television special, The Massively Mixed Up Middle School Mystery, playing one of three young detectives.