Emmanuelle Grey Rossum (born September 12, 1986) is an American actress, director, producer, singer, and songwriter. The accolades she has received include a Saturn Award and Critics' Choice Movie Award, alongside nominations for a Golden Globe Award, an Independent Spirit Award, and two Critics' Choice Television Awards.

Born and raised in New York City, she began professionally performing as a child with the Metropolitan Opera. Early on-screen roles included Genius (1999), Songcatcher (2000), Passionada (2002), and Nola (2003). At sixteen, she was cast in her breakthrough role in Mystic River (2003). Rossum starred in the 2004 sci-fi film The Day After Tomorrow, and received critical acclaim for her performance in the leading role of Christine Daaé in the film adaptation of The Phantom of the Opera (2004). She acted in the films Poseidon (2006), Dragonball: Evolution (2009), Inside (2011), Beautiful Creatures (2013), Comet (2014), You're Not You (2014), and Cold Pursuit (2019).

In television, Rossum is best known for her portrayal of Fiona Gallagher in the television series Shameless (2011–2019). Since the mid-2010s, she has directed and produced television, including the 2022 Peacock series Angelyne in which she also stars.

In 2007, Rossum released her debut album, Inside Out. She released a Christmas EP the same year, titled Carol of the Bells. In 2013, she released a follow-up album called Sentimental Journey.