Sarah Michelle Gellar and Alyson Hannigan chatted with ET on set of the 'Buffy the Vampire Slayer' episode, 'The Prom,’ in 1999. The 'How I Met Your Mother' star is proud of her success.

Alyson Hannigan stayed up to ... Basically, I was on the date with Travis and Taylor." Later in the conversation, Hannigan ...

Alyson Hannigan recalled having a total Swiftie moment after Taylor Swift shouted out the 1999 comedy film “American Pie” in one of her songs. Hannigan, who starred as Michelle Flaherty in the ...