Juliet Marillier is a New Zealand-born writer known for her work in the fantasy genre, focusing predominantly on historical fantasy. Born on 7 August 1948 in Dunedin, New Zealand, she grew up surrounded by Celtic music and stories, which inspired her writings.

Juliet Marillier is best known for her Sevenwaters Trilogy, which draws upon her Celtic-Gaelic roots. Her education at the University of Otago, where she majored in music and languages, has greatly influenced her writing style. She holds a Bachelor of Arts and a Bachelor of Music (Hons) from the university.

Her lifelong interest in history, folklore, and mythology has been a significant influence on her writing. Juliet is the author of twenty-one historical fantasy novels for adults and young adults, along with a collection of short fiction. Her work has garnered several awards.

Currently, Juliet resides in a 110-year-old cottage in a riverside suburb of Perth, Western Australia. Beyond writing, she enjoys tending to her small pack of rescue dogs.