Alyson Hannigan Marks 10 Years Since 'How I Met Your Mother' Finale

Entertainment TV Alyson Hannigan Celebrates 10th Anniversary of How I Met Your Mother's Series Finale: 'Can't Believe It' Hannigan, who played Lily Aldrin on the hit CBS show, marked the passing of a decade since the 'HIMYM' finale on Instagram By Julia Moore Julia Moore Julia Moore is a digital news writer at PEOPLE. A graduate of Northwestern University, she has been working at PEOPLE since 2022. People Editorial Guidelines Published on April 2, 2024 03:50PM EDT The cast of …