William "Will" Robert Horton (formerly Roberts, originally Reed) is a fictional character from the American NBC soap opera Days of Our Lives, most recently portrayed by Guy Wilson. The son of Sami Brady (Alison Sweeney) and Lucas Horton (Bryan Dattilo), the character first appeared on November 16, 1995. In the storyline, Sami gives birth to Lucas' baby but pretends that Austin Reed (Austin Peck) is the father so that he will marry her. The ruse is ultimately revealed, and Will subsequently endures a "turbulent upbringing" due to his mother's complicated love life and endless machinations.
The character was a recurring child role until recast as a teen with Dylan Patton in 2009, and as a young adult with Chandler Massey in 2010. After a 2011 announcement that Will would be involved in a gay storyline, the character kisses another man in 2012. Massey said that he hoped his storyline would challenge people's views on homosexuality and promote tolerance. Will later becomes romantically involved with Sonny Kiriakis (Freddie Smith), with the pair becoming the show's first same-sex supercouple (commonly referred to by the portmanteau "WilSon").