Karen Sheila Gillan (/ˈɡɪlən/; born November 28, 1987) is a Scottish actress and filmmaker. She gained recognition for her work in British film and television, particularly for playing Amy Pond, a primary companion to the Eleventh Doctor in the science fiction series Doctor Who (2010–2013). Her early film roles include the thriller Outcast (2010) and the romantic comedy Not Another Happy Ending (2013). She also worked on the stage while in Britain, appearing in John Osborne's play Inadmissible Evidence (2011).

Gillan made her transition to Hollywood starring in the horror film Oculus (2013) and played the lead in the ABC sitcom Selfie (2014). She achieved stardom for portraying Nebula in several films of the Marvel Cinematic Universe (2014–2023), which are among the highest-grossing films of all time, and Ruby Roundhouse in the fantasy films Jumanji: Welcome to the Jungle (2017) and Jumanji: The Next Level (2019). She also wrote and directed the drama film The Party's Just Beginning (2018), which she also starred in. She has starred in the comedy film Gunpowder Milkshake (2021), the thriller film Dual (2022), the coming-of-age film Late Bloomers (2023), and returned to British television with the series Douglas Is Cancelled (2024).

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