Credits

• 2021 · Doogie Kamealoha, M.D. as Dawn
• 2019 · The Kelly Clarkson Show as Self
• 2018 · Fancy Nancy as Claire Clancy (voice)
• 2016 · The $100,000 Pyramid as Self
• 2013 · Beat Bobby Flay as Self
• 2013 · Sofia the First as (voice)
• 2012 · American Reunion as Michelle Levenstein
• 2011 · Penn & Teller: Fool Us as Self - Host
• 2009 · Watch What Happens Live with Andy Cohen as Self - Guest
• 2008 · The Bonnie Hunt Show as Self
• 2006 · The Megan Mullally Show as Self - Guest
• 2005 · The Reichen Show as Self
• 2005 · How I Met Your Mother as Lily Aldrin
• 2005 · Dancing with the Stars as Self - Contestant
• 2005 · Dancing with the Stars as Self - Audience Member
• 2005 · Dancing with the Stars as Self - Rehearsal Visitor
• 2005 · Robot Chicken as Steelheart (voice)
• 2005 · American Dad! as Lexie (voice)
• 2005 · American Dad! as Ugly Stepsister #2 (voice)
• 2005 · American Dad! as Chelsea (voice)
• 2004 · Veronica Mars as Trina Echolls
• 2003 · The Ellen DeGeneres Show as Self
• 2003 · American Wedding as Michelle Flaherty
• 2003 · Jimmy Kimmel Live! as Self
• 2001 · American Pie 2 as Michelle Flaherty
• 1999 · Angel as Willow Rosenberg
• 1999 · American Pie as Michelle Flaherty
• 1999 · The Late Late Show with Craig Kilborn as Self - Guest
• 1998 · The Wild Thornberrys as Gerda (voice)
• 1998 · That '70s Show as Suzy Simpson
• 1997 · Buffy the Vampire Slayer as Willow Rosenberg
• 1997 · King of the Hill as Stacey Gibson (voice)
• 1996 · The Daily Show as Self
• 1994 · Touched by an Angel as Cassie Peters
• 1993 · Late Night with Conan O'Brien as Self - Guest
• 1992 · Picket Fences as Peggy Patterson
• 1992 · MTV Movie & TV Awards as Self - Presenter
• 1992 · The Tonight Show with Jay Leno as
• 1991 · The Torkelsons as Samantha
• 1991 · Rugrats as Cynthia P.I. (voice)
• 1989 · The Simpsons as Melody Juniper (voice)
• Future · American Pie: Beneath the Crust Vol. 2 as Self
• 2026 · Solo Mio as Meghan
• 2023 · Office Race as Pat
• 2021 · Adorableness as Self
• 2021 · Flora & Ulysses as Phyllis
• 2020 · Outrageous Pumpkins as Self - Host
• 2020 · Girl Scout Cookie Championship as Self - Host
• 2020 · Outmatched as Beth
• 2019 · Abducted: The Mary Stauffer Story as Mary Stauffer
• 2019 · You Might Be the Killer as Chuck
• 2019 · Fancy Nancy: Fancy It Yourself as Nancy
• 2019 · Kim Possible as Dr. Ann Possible
• 2017 · Do You Take This Man as Rachael
• 2017 · The Gong Show as Self - Judge
• 2016 · Star Plates as
• 2013 · Hollywood Game Night as Self
• 2011 · More Business of Being Born as Self [Part 2,3]
• 2011 · Love, Wedding, Marriage as Courtney
• 2009 · The Goode Family as
• 2008 · Buffy the Animated Series as Willow Rosenberg
• 2006 · Farce of the Penguins as Hottie Penguin (voz)
• 2006 · I Love the '70s: Volume 2 as Self
• 2006 · Date Movie as Julia Jones
• 2004 · American Pie: Revealed as Self
• 2004 · Buffy the Vampire Slayer: The Animated Series as Willow Rosenberg
• 2003 · Pepsi Smash as Self - Host
• 2001 · Beyond the City Limits as Lexi
• 2001 · Playboy Mansion Parties Uncensored as Self
• 2000 · Boys and Girls as Betty
• 1999 · 100 Deeds for Eddie McDowd as
• 1999 · Hayley Wagner, Star as Jenna Jakes
• 1999 · Teen Choice Awards as Self
• 1998 · Dead Man on Campus as Lucy
• 1996 · For My Daughter's Honor as Kelly
• 1996 · A Case for Life as Iris
• 1995 · The Stranger Beside Me as Dana
• 1989 · Free Spirit as Jessie Harper
• 1988 · My Stepmother Is an Alien as Jessie Mills
• 1988 · Roseanne as
• 1986 · Impure Thoughts as Patty Stubbs (as Allison Hannigan)
• 1981 · Entertainment Tonight as Self
• Future · Dodie & Cheryl Get Hitched as Cheryl Crum