Hannah Dakota Fanning (born February 23, 1994) is an American actress and model. She rose to prominence at the age of seven for her performance as Lucy Dawson in the drama film I Am Sam (2001), for which she received a Screen Actors Guild Award nomination at age eight, making her the youngest nominee in SAG history. Fanning played major roles in the films Uptown Girls (2003), The Cat in the Hat (2003), Man on Fire (2004), War of the Worlds (2005), Dreamer (2005) and Charlotte's Web (2006).

She took on more mature roles, playing Lewellen in Hounddog (2007), Lily in The Secret Life of Bees (2008) the eponymous character in Coraline (2009), Cherie Currie in The Runaways (2010) and Jane Volturi in The Twilight Saga (2009–12). Her later films include the teen drama Now Is Good (2012), the drama Night Moves (2013), the comedy-drama Very Good Girls (2013), the biography Effie Gray (2014), the western thriller Brimstone (2016), and the heist comedy Ocean's 8 (2018). She currently stars in the period drama TV series The Alienist (2018–present).

Fanning made her modelling debut in 2009 when she featured on the cover of fashion magazines Elle, Vanity Fair, and Cosmopolitan, among others. She also appeared in the fashion week in New York in 2014 and at the opening ceremony of Fashion Week New York S/S 2015.