Killing Heidi are an Australian rock band from Violet Town, Victoria. The band, which went on hiatus in 2006, is most widely known for its multi-platinum album Reflector, released in 2000. In 2016, the band announced they were reforming for their 20th anniversary.

The nucleus of Killing Heidi was singer/songwriter Ella Hooper and her older brother, guitarist Jesse Hooper. They grew up in Violet Town, a small Victorian country town, with a population of approximately 2,000 where their parents worked as music and drama teachers.