American Pie (1999)

directed by Paul Weitz
featuring Jason Biggs, Shannon Elizabeth, Alyson Hannigan, Chris Klein, Natasha Lyonne, Seann William Scott

Buffy the Vampire Slayer: Season 01 (1997)

American Reunion (2012)

directed by Hayden Schlossberg, Jon Hurwitz
featuring Jason Biggs, Alyson Hannigan, Chris Klein, Thomas Ian Nicholas, Tara Reid, Seann William Scott, Mena Suvari, Eddie Kaye Thomas

How I Met Your Mother: Season 06 (2010)

How I Met Your Mother: Season 05 (2009)

How I Met Your Mother: Season 08 (2012)

Buffy the Vampire Slayer: Season 05 (2000)

American Wedding (2003)

directed by Jesse Dylan
featuring Jason Biggs, Alyson Hannigan, January Jones, Thomas Ian Nicholas, Seann William Scott

American Pie 2 (2001)

directed by J.B. Rogers
featuring Jason Biggs, Jennifer Coolidge, Shannon Elizabeth, Alyson Hannigan, Chris Klein, Natasha Lyonne, Seann William Scott

How I Met Your Mother: Season 01 (2005)

How I Met Your Mother: Season 04 (2008)

Buffy the Vampire Slayer: Season 06 (2001)

How I Met Your Mother: Season 02 (2006)

Date Movie (2006)

directed by Aaron Seltzer
featuring Alyson Hannigan, Adam Campbell, Sophie Monk, Eddie Griffin, Meera Simhan

You Might Be the Killer (2018)

directed by Brett Simmons
featuring Fran Kranz, Alyson Hannigan, Brittany S. Hall, Patrick Reginald Walker, Keith David, Bryan Price

My Stepmother Is an Alien (1988)

directed by Richard Benjamin
featuring Dan Aykroyd, Kim Basinger, Jon Lovitz, Alyson Hannigan, Joseph Maher, Seth Green, Juliette Lewis

Buffy the Vampire Slayer: Season 03 (1998)

How I Met Your Mother: Season 03 (2007)

Buffy the Vampire Slayer: Season 07 (2002)

Buffy the Vampire Slayer: Season 04 (1999)

Boys and Girls (2000)

directed by Robert Iscove
featuring Freddie Prinze, Jr., Claire Forlani, Jason Biggs, Amanda Detmer, Heather Donahue, Alyson Hannigan

Buffy the Vampire Slayer: Season 02 (1997)

Do You Take This Man (2017)

directed by Joshua Tunick
featuring Anthony Rapp, Jonathan Bennett, Alyson Hannigan, Thomas Dekker

Indecent Seduction (1996)

directed by Alan Metzger
featuring Nicholle Tom, Gary Cole [act], Mary Kay Place, Mac Davis, Alyson Hannigan

Rip It Off (2002)

directed by Gigi Gaston
featuring Jennifer Esposito, Alyson Hannigan, Steve Harris, Nastassja Kinski, Brian McCardie