Bill Denbrough

William "Bill" Denbrough is the main protagonist of Stephen King's It. He is the leader of the Losers Club, ever since he lost his then-six-year-old brother George to the title adversary. He blamed himself for it, and his parents blamed him too. He became friends with the other members, who became his followers. He is the arch-enemy of IT (Pennywise the Dancing Clown).

In the 1990 miniseries, he is played by Richard Thomas as an adult and as a child, he is portrayed by the late Jonathan Brandis, who also plays Bastian Balthazar Bux from The Neverending Story. In the 2017 film, he is portrayed by Jaeden Lieberher as his younger self, who also played Henry Carpenter and by James Mcavoy as his adult self in the 2019 sequel, who also Charles Xavier, Gnomeo, Wesley Gibson, and Hazel.

Bill stutters when he speaks. The cause of this was most likely a car accident when he was little, but there is no proof of this.

Bill is constantly taunted by It, also known as Pennywise the Clown.