Lex was born to Lionel Luthor and Lillian Luthor. While accompanying his father on a business trip to Smallville, Kansas he is caught in a meteor shower, which causes him to lose his hair as well as causing some of Smallville's residents to develop unique abilities. Lex began attending Excelsior Academy Preparatory School along with his brother, Clark and Oliver Queen. In 1993, Lex's mother, Lillian dies of a heart condition. Afterward, Lex is raised by Lionel Luthor along side his sister Tess and adoptive brother Clark, all of whom were trained to be his heir and were pitted against one another in the hopes that one of them would prove a worthy successor to his empire but Lionel hoped that Clark would prove the most worthy. Lex studied meteor-infected individuals to help and benefit them and to oppose his father and adoptive brother. Some time before 2010, he branded the family crest on Clark's arm using gold kryptonite and then was murdered by Clark in retaliation with Lionel's approval.