David Richard Campbell is a Canadian-American arranger, composer, and conductor. He has composed and arranged music for many films, including North Country (2005), Brokeback Mountain (2005), August: Osage County (2013), Annie (2014), Foxcatcher (2014), Rock of Ages (2012), Dreamgirls (2007), and Joy (2015). He has also worked on over 450 gold and platinum albums by artists of a wide range of genres, including The Rolling Stones, Neil Diamond, Metallica, Radiohead, Evanescence, Rush, Beyoncé, Muse, Michael Jackson, Aaliyah, Ariana Grande, Harry Styles, Aerosmith, Juanes, Garth Brooks, and various albums by his son Beck.

Joy is a 2015 American biographical comedy-drama film written and directed by David O. Russell and starring Jennifer Lawrence as Joy Mangano, a self-made millionaire who created her own business empire.