William's family is comprised of a twin brother named Rupert and an older sister, Emma. His mother, Annabel, operates a market garden and resides with his father, Robin, a business professional. Notably, William represented his school, Wellington College, in a variety of sports, including rugby, football, basketball, athletics, long jump, and triple jump.
At the age of 19, William pursued higher education at Exeter University, where he earned a 2.2 degree in politics. In addition to his musical endeavors, William has also ventured into the world of acting. He appeared in the BBC film "Mrs. Henderson Presents" and, during the early months of 2007, took on the role of Nicky Lancaster in Noel Coward's "The Vortex" at Manchester's Royal Exchange Theatre.