Rupert Gregson-Williams is a British film score composer. Educated at St John's College, Cambridge choir school and Lancing College, he is the brother of Harry Gregson-Williams and former member of Hans Zimmer's Media Ventures team of composers.

His filmography includes Over the Hedge, Hotel Rwanda, Click, I Now Pronounce You Chuck and Larry, Bee Movie and You Don't Mess with the Zohan. He has also written music for television shows, including British comedy-drama William and Mary, Long Way Round and Bedtime Stories (film), and the video game Battlefield 2: Modern Combat.