Atticus Matthew Cowper Ross (born 16 January 1968) is an English musician, composer, producer, and audio engineer. Along with Trent Reznor, Ross won the Academy Award for Best Original Score for The Social Network in 2010. In 2013, the pair won a Grammy Award for Best Score Soundtrack for Visual Media for their soundtrack to The Girl with the Dragon Tattoo. Atticus Ross's songs are represented by Downtown Music Publishing.
Ross was born in Ladbroke Grove, Greater London, the son of Roxana Lampson and Ian Ross, a founder of Radio Caroline. His sister, Liberty Ross, is a successful fashion model. His maternal grandfather was British diplomat Miles Lampson, 1st Baron Killearn. His great-grandfather was the noted Italian pathologist and bacteriologist Aldo Castellani. He was educated at Eton College, where he was a contemporary of future Prime Minister David Cameron and at the Courtauld Institute of Art, London.
Ross first came to notice in the mid-1990s as a programmer for Tim Simenon's Bomb the Bass during the period of the albums Unknown Territory and Clear. He worked on a number of production and remix projects with Simenon, as well as forming a collaborative relationship with Barry Adamson. He programmed The Negro Inside Me and Oedipus Schmoedipus, and produced As Above So Below before forming his own band, 12 Rounds, with Claudia Sarne and Adam Holden. They released two albums, Jitterjuice and My Big Hero. A third full-length album was produced by Trent Reznor, but was ultimately never finished. Three songs from that album have since been released on the band's website.