A 35-year old high school drop out and professional singer who has a rude attitude and Rodrick wants to be like him. In the novel Rodrick Rules, he was voted "Most Likely to Be a Rock Star" which influenced Rodrick to persuade him to join the band. Frank Heffley strongly dislikes Bill because he disapproves of his lifestyle and is afraid Rodrick will follow in his footsteps. In the live-action movie version of Rodrick Rules he is portrayed by Fran Kranz and is the main antagonist as he agrees to join Rodrick's rock band Loded Diper and later attempts to kick him out for an unknown reason. After performing the song "Exploded Diper", Rodrick retaliates and kicks him out. In the book Greg describes him as unemployed and still lives with his parents even though he is 35 years old. Also, in Rodrick Rules Bill appears to be a slob, as he "slorks" pot roast.