Deborah Lynn Scott (born 1954), also known as Deborah Scott, is a costume designer and set designer best known for her work in James Cameron's directorial venture Titanic, which won her the Academy Award for Best Costume Design.

Her first movie as a costume designer was Don't Answer the Phone (1979). Some of her other movies are E.T. the Extra-Terrestrial (1982), Back to the Future (1985), Legends of the Fall(1994), Wild Wild West (1999), The Patriot (2000), Transformers (2007), Avatar (2009), and Love & Other Drugs (2010).

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