Harry Gregson-Williams (b. 1961) is a composer who wrote additional background music for Muppet Treasure Island and conducted the score. His brother, Rupert Gregson-Williams, has also composed for the Jim Henson Company.
Gregson-Williams has scored such films as The Replacement Killers, Enemy of the State, Bridget Jones: The Edge of Reason, The Chronicles of Narnia: The Lion, the Witch and the Wardrobe, The Chronicles of Narnia: Prince Caspian, and several DreamWorks Animation features, including the Shrek series and Chicken Run.