Harry Gregson-Williams (born 13 December 1961) is an English composer, conductor, orchestrator, and record producer. He has composed music for video games, television and films including the Metal Gear series, Phone Booth, and , ', ', Antz, The Tigger Movie, Chicken Run and , the Shrek franchise, ', Flushed Away, Arthur Christmas, Early Man, Catch-22, and several films from Scott Free Productions. He is also the older brother of fellow composer Rupert Gregson-Williams.
Gregson-Williams collaborated with several film directors such as Ridley Scott, Tony Scott, Andrew Adamson, Ben Affleck, Joel Schumacher, Antoine Fuqua, Niki Caro, Nick Park, and Peter Lord.
Gregson-Williams won a musical scholarship to St John's College School in Cambridge at the age of seven. He was a child chorister at the school. He later attended Stowe School, an independent boarding school in the civil parish of Stowe in Buckinghamshire, where he was a music scholar. He next went to the Guildhall School of Music and Drama in London.
He learned to play the piano as a child on a Broadwood piano which his father had bought with the winnings from a hundred-to-one bet during the Grand National.