The eighth season of the American television comedy series How I Met Your Mother was announced in March 2011 along with confirmation of the seventh season. The season premiered on September 24, 2012 and concluded on May 13, 2013.

Lily Aldrin is a fictional character in the CBS television series How I Met Your Mother. Lily is portrayed by American actress Alyson Hannigan. She is married to Marshall Eriksen and is best friends with Ted Mosby, Robin Scherbatsky and Barney Stinson. Lily is a kindergarten teacher and an amateur painter. In the eighth season, she gets a job as an art consultant. She is the only member of the original main cast, who has not appeared in every episode because Alyson Hannigan took leave after giving birth to her first child.