Lucas Horton is a fictional character on the American daytime soap opera Days of Our Lives, portrayed by Bryan Dattilo. Introduced in 1993 as Lucas Roberts, the military cadet son of businesswoman Kate Roberts, he later discovers he is the son of Bill Horton. Lucas was once in a relationship and married to Sami Brady, a relationship his mother Kate strongly disapproved of and repeatedly tried to derail. In 2007, Lucas changed his and his son's surname to his father's surname. Lucas and Sami are the parents of Will Horton and Allie Horton. Lucas has also been married to Carrie Brady, Chloe Lane, and Nicole Walker. An important storyline for Lucas is his recurring battle with alcoholism.