Sandy Powell CBE RDI (born 7 April 1960) is a British costume designer. She is recognized for her prolific work across independent films and blockbusters in a career spanning over three decades. She has received numerous accolades, including three Academy Awards, three BAFTA Awards, and two Costume Designers Guild Awards. She has received various honorary awards, including the BAFTA Fellowship in 2023. Powell was appointed Commander of the Order of the British Empire (CBE) in the 2025 New Year Honours for services to costume design.

Powell is best known for collaborating with directors Derek Jarman, Neil Jordan, Todd Haynes and Martin Scorsese. She has received 15 nominations for the Academy Award for Best Costume Design and has won three times for Shakespeare in Love (1998), The Aviator (2004), and The Young Victoria (2009). She has also been nominated for the BAFTA Award for Best Costume Design a record 16 times and had three wins for Velvet Goldmine (1998), The Young Victoria, and The Favourite (2018).

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