Editing Alyson Hannigan (section)

===Television===
{| class="wikitable sortable"
|-
! Year
! Title
! Role
! class="unsortable" | Notes
|-
| 1989–1990
| ''[[Free Spirit (TV series)|Free Spirit]]''
| Jessie Harper
| Main role, 14 episodes
|-
| 1990
| ''[[Roseanne]]''
| Jan
| Episode: "Like, a New Job"
|-
| 1991
| ''[[Switched at Birth (1991 film)|Switched at Birth]]''
| Gina Twigg (Age 13–16)
| Television film
|-
| 1993
| ''[[The Torkelsons/Almost Home|Almost Home]]''
| Samantha
| 2 episodes
|-
| 1994
| ''[[Touched by an Angel]]''
| Cassie Peters
| Episode: "Cassie's Choice"
|-
| 1995
| ''[[The Stranger Beside Me (film)|The Stranger Beside Me]]''
| Dana
| Television film
|-
| rowspan="2" | 1996
| ''[[For My Daughter's Honor]]''
| Kelly
| Television film
|-
| ''[[Picket Fences]]''
| Peggy Patterson
| Episode: "To Forgive Is Divine"
|-
| 1997–2003
| ''[[Buffy the Vampire Slayer]]''
| [[Willow Rosenberg]]
| Main role, 144 episodes
|-
| 1999–2000
| ''[[100 Deeds for Eddie McDowd]]''
| Gigi
| Voice, 3 episodes
|-
| 2000
| ''[[The Wild Thornberrys]]''
| Gerda
| Voice, episode: "Every Little Bit Alps"
|-
| 2001–2003
| ''[[Angel (1999 TV series)|Angel]]''
| Willow Rosenberg
| 3 episodes
|-
| 2002–2003
| ''[[Rugrats]]''
| Cynthia P.I./Young Starlet
| Voice, 3 episodes
|-
| rowspan="2" | 2004
| ''[[That '70s Show]]''
| Suzy Simpson
| 2 episodes
|-
| ''[[King of the Hill]]''
| Stacey Gibson
| Voice, episode: "Talking Shop"
|-
| 2005
| ''[[Veronica Mars]]''
| [[Trina Echolls]]
| 3 episodes
|-
| 2005–2014
| ''[[How I Met Your Mother]]''
| [[Lily Aldrin]]
| Main role, 206 episodes
|-
| 2009
| ''[[The Goode Family]]''
| Michelle
| Voice, episode: "Graffiti in Greenville"
|-
|2010
|''[[Food Network Challenge]]''
|Herself
|Host; Episode: "Outrageous Pumpkins 2"
|-
| 2011
| ''[[The Simpsons]]''
| Melody
| Voice, episode: "[[Flaming Moe]]"
|-
| 2011, 2018
| ''[[Robot Chicken]]''
| Various voices
| 2 episodes
|-
| rowspan="3" | 2011; 2013; 2023
| rowspan="3" | ''[[American Dad!]]''
| Chelsea
| Voice, episode: "Virtual In-Stanity"
|-
| Ugly Stepsister #2
| Voice, episode: "Finger Lenting Good"
|-
| Lexie
| Voice, episode: "Cow I Met Your Moo-ther"
|-
| rowspan="2" | 2014
| ''[[Sofia the First]]''
| Winter
| Voice, episode: "Winter's Gift"
|-
| ''[[The McCarthys]]''
| Pam
| Episode: "Red Sox Swap"
|-
| 2016–2023
| ''[[Penn & Teller: Fool Us]]''
| Herself
| Host, 103 episodes<ref>{{cite web | url=https://www.cwtvpr.com/the-cw/shows/the-cw-network-2023-scheduling-strategy-press-conference/releases/?view=101999-the-cw-network-announces-its-seven-night-primetime-schedule-for-2023-2024 | title=CW Press &#124; THE CW NETWORK ANNOUNCES ITS SEVEN-NIGHT PRIMETIME SCHEDULE FOR 2023-2024 | date=May 18, 2023 | access-date=April 24, 2024 | archive-date=October 3, 2023 | archive-url=https://web.archive.org/web/20231003014513/https://www.cwtvpr.com/the-cw/shows/the-cw-network-2023-scheduling-strategy-press-conference/releases/?view=101999-the-cw-network-announces-its-seven-night-primetime-schedule-for-2023-2024 | url-status=live }}</ref>
|-
| 2018–2022
| ''[[Fancy Nancy (TV series)|Fancy Nancy]]''
| Claire Clancy
| Voice, main role (57 episodes)
|-
| rowspan="3" | 2019
| ''[[Kim Possible (film)|Kim Possible]]''
| Ann Possible
| Television film
|-
| ''[[Pure (Canadian TV series)|Pure]]''
| Esther Dunkel
| 2 episodes
|-
| ''[[Abducted: The Mary Stauffer Story]]''
| Mary Stauffer
| Television film<ref>{{Cite web |url=https://deadline.com/2019/04/lifetime-orders-abduction-of-mary-stauffer-movie-starring-alyson-hannigan-saving-alex-1202587289/ |title=Lifetime Orders 2 Movies: 'Abduction Of Mary Stauffer' Starring Alyson Hannigan & 'Saving Alex' |first=Denise |last=Petski |date=April 3, 2019 |website=Deadline |access-date=April 4, 2019 |archive-date=April 4, 2019 |archive-url=https://web.archive.org/web/20190404132647/https://deadline.com/2019/04/lifetime-orders-abduction-of-mary-stauffer-movie-starring-alyson-hannigan-saving-alex-1202587289/ |url-status=live }}</ref>
|-
| 2020–2021
| ''Outrageous Pumpkins''
| rowspan="2" | Herself
| Host, 8 episodes
|-
| rowspan="2" | 2020
| ''[[Girl Scout Cookie Championship]]''
| Host, 4 episodes
|-
| ''[[Outmatched]]''
| Annabeth
| Episode: "Couple's Friends"
|-
| rowspan="2" | 2021
| ''[[Martha Gets Down and Dirty]]''
| rowspan="2" | Herself
| Episode: "House Planting Party"<ref>{{cite web |url=https://people.com/home/martha-stewart-gets-down-and-dirty-in-new-show-with-a-list-celeb-friends-see-the-trailer/ |title=Martha Stewart Gets 'Down and Dirty' in New Show with A-List Celeb Friends |date=June 3, 2021 |accessdate=February 19, 2023 |work=[[People (magazine)|People]] |first=Hannah |last=Chubb |archive-date=February 19, 2023 |archive-url=https://web.archive.org/web/20230219202530/https://people.com/home/martha-stewart-gets-down-and-dirty-in-new-show-with-a-list-celeb-friends-see-the-trailer/ |url-status=live }}</ref>
|-
| ''[[Adorableness (TV series)|Adorableness]]''
| Panelist<ref>{{cite web |last=Ossad |first=Jordana |title=MTV is About to Get a Dose of Adorableness |url=https://www.mtv.com/news/3178380/mtv-new-comedy-show-adorableness/ |publisher=[[MTV]] |date=June 21, 2021 |access-date=April 24, 2024 |archive-date=July 6, 2022 |archive-url=https://web.archive.org/web/20220706234614/https://www.mtv.com/news/3178380/mtv-new-comedy-show-adorableness/ |url-status=dead }}</ref>
|-
| rowspan="3" | 2023
| ''[[Doogie Kameāloha, M.D.]]''
| Dawn
| Episode: "Message from the Chief"
|-
| ''Office Race''
| Pat
| [[Comedy Central]] original television film
|-
| ''[[Dancing with the Stars (American TV series)|Dancing with the Stars]]''
| rowspan="2" | Contestant
| Contestant on [[Dancing with the Stars (American season 32)|season 32]]; 11 episodes<ref>{{Cite web |last= |first= |last2= |first2= |last3= |first3= |date=2023-09-13 |title='Dancing With the Stars' season 32 cast revealed: Alyson Hannigan, Mira Sorvino and more |url=https://nypost.com/2023/09/13/dancing-with-the-stars-season-32-cast-revealed-alyson-hannigan-mira-sorvino-and-more/ |access-date=2023-09-14 |archive-date=February 6, 2024 |archive-url=https://web.archive.org/web/20240206020915/https://nypost.com/2023/09/13/dancing-with-the-stars-season-32-cast-revealed-alyson-hannigan-mira-sorvino-and-more/ |url-status=live }}</ref>
|-
|2024
|''[[Beat Bobby Flay]]''
|Episode: "Sweet Defeat"
|}