Abbie Cornish (born August 7, 1982) is an Australian actress. Cornish is best known for her film roles as Heidi in Somersault (2004), Fanny Brawne in Bright Star (2009), Sweet Pea in Sucker Punch (2011), Lindy in Limitless (2011), Clara Murphy in RoboCop (2014), as Sarah in Geostorm (2017) and for her work with writer/director Martin McDonagh in Seven Psychopaths (2012) and Three Billboards Outside Ebbing, Missouri (2017). For the latter, Cornish won her first Screen Actors Guild Award as part of the cast. In 2018, she portrayed Cathy Mueller in the first season of Amazon Video series Jack Ryan opposite John Krasinski. She also played Dixy in the film The Virtuoso (2021) alongside Anthony Hopkins.
Cornish began modelling at age 13 after reaching the finals of a Dolly Magazine competition. In 1999, Cornish was awarded the Australian Film Institute Young Actor's Award for her role in the Australian Broadcasting Corporation's television show Wildside and was offered her first role in a feature film, The Monkey's Mask.
Cornish is a rapper, singer and songwriter. She has been rapping under the name MC Dusk since 2000 and was part of Australian hip hop group Blades from the age of 18 to 22. In 2015, Cornish supported American rapper Nas on his Australian tour. The same year, she released two new tracks on SoundCloud: "Evolve" featuring Jane Tyrrell and "Way Back Home", which was produced by Suffa from Hilltop Hoods. The songs were re-released in 2020, and her first EP, Key of the Sun, was released in 2021.