Alyson Hannigan (as Willow Rosenberg) with Seth Green (as Oz)
in Buffy the Vampire Slayer (1997)

Alyson Hannigan (as Willow Rosenberg) with Amber Benson (as Tara Maclay)
in Buffy the Vampire Slayer (1997)

Alyson Hannigan (as Willow Rosenberg) with Nicholas Brendon (as Xander Harris)
in Buffy the Vampire Slayer (1997)

Alyson Hannigan (as Michelle Flaherty) with Jason Biggs (as Jim Levenstein)
in American Pie (1999)

Alyson Hannigan (as Michelle Flaherty) with Jason Biggs (as Jim Levenstein)
in American Pie 2 (2001)

Alyson Hannigan with Iyari Limon
in Buffy the Vampire Slayer (2002)

Alyson Hannigan (as Michelle Flaherty) with Jason Biggs (as Jim Levenstein)
in American Wedding (2003)

Alyson Hannigan (as Lily Aldrin) with David Burtka (as Scooter)
in How I Met Your Mother (2005)

Alyson Hannigan (as Lily Aldrin) with Jason Segel (as Marshall Eriksen)
in How I Met Your Mother (2005)

Alyson Hannigan (as Julia Jones) with Adam Campbell (as Grant Funkyerdoder)
in Date Movie (2006)

Who's Dated Who content is contributed and edited by our readers. Please report errors or omissions on this page.