Katherine Langford (born 29 April 1996) is an Australian actress. She is known for starring as Hannah Baker in the 2017 Netflix series 13 Reasons Why (2017), based on the novel of the same name, for which she received a Golden Globe Award nomination. In 2018, she appeared as Vesna in the independent comedy/drama film The Misguided, and Leah Burke in the romantic comedy-drama film Love, Simon (2018).
Langford was born in Perth and raised in Applecross, a riverside suburb of Perth. She is the eldest daughter of Elizabeth Langford (née Green), a pediatrician, and Stephen Langford, a flying doctor and director of medical services at the Royal Flying Doctor Service Western Operations. She began voice lessons in 2005, and received classical, jazz, and contemporary vocal training. She was offered a place at Perth Modern School for her senior high years, where she studied music and drama, and was sports captain and a nationally ranked swimmer.