Alyson Lee Hannigan (1974-yil 24-martda tug‘ilgan) amerikalik aktrisa va televideniye olib boruvchisi. U eng ko‘p tanilgan rollari bilan tanilgan: "Buffy the Vampire Slayer" teleserialida Willow Rosenberg (1997–2003), "How I Met Your Mother" sitkomida Lily Aldrin (2005–2014), bu roli uchun 2009-yilda People's Choice Award mukofotini qo‘lga kiritgan, va "American Pie" film seriyasida Michelle Flaherty (1999–2012). 2016-yildan beri Hannigan "Penn & Teller: Fool Us" teleko‘rsatuvini olib bormoqda. Shuningdek, u Disney Junior animatsion seriyasida Claire Clancy rolida ovoz beradi (Fancy Nancy, 2018–hozirgi vaqtgacha).