Alyson Hannigan

ActorProducerCrew Mar 24 (age 52) Washington, District of Columbia, USA 1981–2026 (45 year career)

6.2 avg rating

Biography

Alyson Lee Hannigan (born March 24, 1974) is an American actress and television presenter. She is best known for her roles as Willow Rosenberg in the television series Buffy the Vampire Slayer (1997–2003), as Lily Aldrin in the sitcom How I Met Your Mother (2005–2014) for which she won a People's Choice Award in 2009, and as Michelle Flaherty in the American Pie film series (1999–2012). Since 2016, Hannigan has hosted the television show Penn & Teller: Fool Us. She also provides the voice of Cla…

Known For

Film

How I Met Your Mother

Lily Aldrin

Film

Buffy the Vampire Slayer

Willow Rosenberg

Film

American Pie

Michelle Flaherty

Film

American Pie 2

Michelle Flaherty

Film

American Reunion

Michelle Levenstein

Film

American Wedding

Michelle Flaherty

Film

Flora & Ulysses

Phyllis

Film

My Stepmother Is an Alien

Jessie Mills

Filmography

Acting (83)

Movies (30)

Solo Mio

as Meghan

Office Race

as Pat

Flora & Ulysses

as Phyllis

Kim Possible

as Dr. Ann Possible

You Might Be the Killer

2019

as Chuck

5.9

Abducted: The Mary Stauffer Story

as Mary Stauffer

Do You Take This Man

as Rachael

American Reunion

as Michelle Levenstein

6.3

Love, Wedding, Marriage

2011

as Courtney

5.2

More Business of Being Born

2011

as Self [Part 2,3]

Date Movie

2006

as Julia Jones

4.3

Farce of the Penguins

2006

as Hottie Penguin (voz)

4.1

American Pie: Revealed

as Self

American Wedding

as Michelle Flaherty

American Pie 2

as Michelle Flaherty

Beyond the City Limits

2001

as Lexi

4.5

Playboy Mansion Parties Uncensored

as Self

Boys and Girls

as Betty

American Pie

as Michelle Flaherty

Hayley Wagner, Star

as Jenna Jakes

Dead Man on Campus

as Lucy

A Case for Life

as Iris

For My Daughter's Honor

1996

as Kelly

5.1

The Stranger Beside Me

1995

as Dana

6.9

My Stepmother Is an Alien

1988

as Jessie Mills

5.7

Impure Thoughts

1986

as Patty Stubbs (as Allison Hannigan)

3.3

American Pie: Beneath the Crust Vol. 2

as Self

Dodie & Cheryl Get Hitched

as Cheryl Crum

Once More, With Feeling

as "Willow"

American Pie

as Michelle Flaherty

Television (53)

Dancing with the Stars Official Podcast

2025

as Self

Doogie Kamealoha, M.D.

as Dawn

Adorableness

as Self

Outmatched

as Beth

Outrageous Pumpkins

as Self - Host

Girl Scout Cookie Championship

2020

as Self - Host

The Kelly Clarkson Show

2019

as Self

6.4

Fancy Nancy: Fancy It Yourself

2019

as Nancy

6.0

Fancy Nancy

2018

as Claire Clancy (voice)

The Gong Show

as Self - Judge

The $100,000 Pyramid

as Self

Star Plates

Sofia the First

as (voice)

Beat Bobby Flay

as Self

Hollywood Game Night

as Self

Penn & Teller: Fool Us

2011

as Self - Host

7.2

Penn & Teller: Fool Us

2011

as Self - Host

7.2

Watch What Happens Live with Andy Cohen

as Self - Guest

The Goode Family

The Bonnie Hunt Show

as Self

Buffy the Animated Series

2008

as Willow Rosenberg

9.2

The Megan Mullally Show

2006

as Self - Guest

4.2

I Love the '70s: Volume 2

2006

as Self

American Dad!

2005

as Chelsea (voice)

7.0

How I Met Your Mother

2005

as Lily Aldrin

8.1

Dancing with the Stars

2005

as Self - Contestant

6.1

Robot Chicken

2005

as Steelheart (voice)

The Reichen Show

as Self

Veronica Mars

as Trina Echolls

Jimmy Kimmel Live!

as Self

The Ellen DeGeneres Show

as Self

Pepsi Smash

as Self - Host

Angel

as Willow Rosenberg

The Late Late Show with Craig Kilborn

1999

as Self - Guest

4.6

100 Deeds for Eddie McDowd

Teen Choice Awards

as Self

That '70s Show

as Suzy Simpson

The Wild Thornberrys

as Gerda (voice)

King of the Hill

as Stacey Gibson (voice)

7.4

Buffy the Vampire Slayer

as Willow Rosenberg

The Daily Show

as Self - Guest

Touched by an Angel

as Cassie Peters

Late Show with David Letterman

1993

as Self - Guest

6.4

Late Night with Conan O'Brien

1993

as Self - Guest

7.2

The Tonight Show with Jay Leno

Picket Fences

as Peggy Patterson

MTV Movie & TV Awards

1992

as Self - Presenter

8.1

Rugrats

1991

as Cynthia P.I. (voice)

The Torkelsons

as Samantha

The Simpsons

as Melody Juniper (voice)

Free Spirit

as Jessie Harper

Roseanne

Entertainment Tonight

1981

as Self

4.1

Crew (2)

Movies (1)

American Pie: Revealed

2004

Thanks

6.0

Television (1)

Penn & Teller: Fool Us

2011

Producer

7.2