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Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Buffy the Vampire Slayer (1997)Seth Green and Alyson Hannigan in Buffy the Vampire Slayer (1997)Seth Green and Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Mylanta: with Alyson Hannigan (1993)Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan and Iyari Limon in Buffy the Vampire Slayer (1997)Alyson Hannigan and Iyari Limon in Buffy the Vampire Slayer (1997)Alyson Hannigan in Roseanne (1988)Alyson Hannigan, Suzie Plakson, and Jason Segel in How I Met Your Mother (2005)Alyson Hannigan, Sam Anderson, Thomas Dekker, Lee Garlington, Anthony Rapp, etc.Alyson Hannigan, Sam Anderson, Mackenzie Astin, etc.Alyson Hannigan in Do You Take This Man (2016)Alyson Hannigan, Mackenzie Astin, and Lee Garlington in Do You Take This Man (2016)Sarah Michelle Gellar, Seth Green, Charisma Carpenter, Alyson Hannigan, etc.Sarah Michelle Gellar, Seth Green, Charisma Carpenter, Alyson Hannigan, Nicholas Brendon, etc.Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan and Jason Segel in How I Met Your Mother (2005)Alyson Hannigan and Alan Fudge in How I Met Your Mother (2005)Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan and Nicholas Brendon in Buffy the Vampire Slayer (1997)Sarah Michelle Gellar, Ethan Erickson, Alyson Hannigan, etc.Sarah Michelle Gellar and Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan and Tom Lenk in Buffy the Vampire Slayer (1997)Alyson Hannigan and James Marsters in Buffy the Vampire Slayer (1997)Alyson Hannigan and Amber Benson in Buffy the Vampire Slayer (1997)Alyson Hannigan and Amber Benson in Buffy the Vampire Slayer (1997)Sarah Michelle Gellar, Charisma Carpenter, Alyson Hannigan, etc.Alyson Hannigan in Buffy the Vampire Slayer (1997)Sarah Michelle Gellar and Alyson Hannigan in Buffy the Vampire Slayer (1997)Sarah Michelle Gellar and Alyson Hannigan in Buffy the Vampire Slayer (1997)Alyson Hannigan in Buffy the Vampire Slayer (1997)Seth Green and Alyson Hannigan in Buffy the Vampire Slayer (1997)Sarah Michelle Gellar, Alyson Hannigan, etc.Sarah Michelle Gellar, Alyson Hannigan, Nicholas Brendon, etc.Alyson Hannigan, Nicholas Brendon, etc.Alyson Hannigan and Amber Benson in Buffy the Vampire Slayer (1997)Alyson Hannigan, Jason Segel, and Cobie Smulders in How I Met Your Mother (2005)Neil Patrick Harris, Alyson Hannigan, and Jason Segel in How I Met Your Mother (2005)Alyson Hannigan and Josh Radnor in How I Met Your Mother (2005)Neil Patrick Harris, Alyson Hannigan, Jason Segel, etc.Alyson Hannigan, Michael Gross, and Jason Segel in How I Met Your Mother (2005)Alyson Hannigan in How I Met Your Mother (2005)Neil Patrick Harris, Alyson Hannigan, and Cobie Smulders in How I Met Your Mother (2005)Alyson Hannigan and Jason Segel in How I Met Your Mother (2005)
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Biography

Alyson Hannigan was born in Washington, D.C., to Emilie (Posner), a real estate agent, and Al Hannigan, a truck driver. She began her acting career in Atlanta at the young age of 4 in commercials sponsoring such companies as McDonald's, Six Flags, and Oreos. She is a seasoned television actress veteran, guest starring in Picket Fences (1992), ... See full bio »
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