Sarah Michelle Gellar and Alyson Hannigan Sarah Michelle Gellar and Alyson Hannigan

Buffy and Willow are reunited ... and it feels so good.

Former Buffy the Vampire Slayer co-stars Sarah Michelle Gellar and Alyson Hannigan, who played best friends on the series, got together over the holiday weekend and have the pictures to prove it.

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The shots appear to have been taken at a birthday party in Santa Monica for Hannigan's 3-year-old daughter, Keeva, which featured a farm and pony rides.

Hannigan's husband, Alexis Denisof, who also starred on Buffy, was also at the celebration, along with Gellar's husband Freddie Prinze Jr.

Gellar tweeted that Hannigan and Denisof "know how to throw a party," and added a second photo of herself, Hannigan and a balloon giraffe on Twitter.

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