Katherine Langford

is an Australian actress. After appearing in several independent films, she had her breakthrough starring as Hannah Baker in the Netflix television series 13 Reasons Why (2017–2018), which earned her a Golden Globe Award nomination. She went on to appear in the films Love, Simon (2018) and Knives Out (2019), and headline the dark comedy Spontaneous (2020) – for which she received a Critics' Choice Award nomination – and has also starred in the Netflix series Cursed (2020).

Langford first appeared in several small independent films, including Story of Miss Oxygen (2015), Imperfect Quadrant (2016), and Daughter (2016). She portrayed the lead character in Daughter, which debuted at the 2016 Cannes Film Festival. In 2016, after declining the offer from Western Australian Academy of Performing Arts, Langford auditioned for Will, a television series centred on the young life of William Shakespeare. She did not get the role.

Langford was then cast as Hannah Baker in the mystery teen drama TV series 13 Reasons Why, playing Baker for the series' first two seasons.

When she landed the role, she had only 10 days to get an O-1 visa as she had not worked in the United States before.She researched the role, speaking with a representative of the sexual assault awareness campaign "It's On Us" and a psychiatrist who specializes in adolescence. Several critics lauded her performance as Baker; The Hollywood Reporter wrote: "Langford's heartbreaking openness makes you root for a fate you know isn't possible. The actress' performance is full of dynamic range, setting it against Minnette's often more complicated task in differentiating between moods that mostly go from uncomfortable to gloomy to red-eyed, hygiene-starved despair." She earned various awards and nominations for the role, including a nomination for the Golden Globe Award for Best Actress – Television Series Drama. On 25 May 2018, Langford confirmed that she would not return as Hannah Baker in the third season of the series.

In December 2016, she signed with the William Morris Endeavor agency. She then appeared in her first feature film, The Misguided, an independent comedy-drama by Shannon Alexander, which premiered in January 2018. She also starred as Leah in the 2018 film Love, Simon. In October 2018, she was cast in Avengers: Endgame. However, her scenes were cut from the final film when audiences at test screenings found her scene confusing.

In 2019, Langford co-starred in Knives Out, a murder mystery film. The ensemble cast received critical acclaim, and she was part of various awards and nominations for the role, which included a Critics' Choice Award nomination for Best Cast.

In 2020, she starred in the film Spontaneous, a well-reviewed, dark comedy for which she received a Critics' Choice Super Awards nomination for Best Actress in a Science Fiction/Fantasy Movie. On 12 September 2018, it was announced that Langford had been cast in the web television series Cursed. Set in an re-imagined Arthurian world, Langford portrays Nimue, a teenage girl destined to become the Lady of the Lake. It premiered on Netflix in July 2020.