Buffy The Vampire Slayer Reunion 2014: Sarah Michelle Gellar took to Twitter to share pix of a mini-'Buffy the Vampire Slayer' reunion after former co-stars visit her on 'Crazy Ones' set.

Sarah Michelle Gellar's "Buffy the Vampire Slayer" castmates Seth Green and Michelle Trachtenberg visited Gellar on set of "The Crazy Ones." 

Sarah Michelle Gellar is causing an online hemorrhage. The former vampire slayer posted a reunion picture to Twitter of her Buffy The Vampire Slayer co-stars reuniting on the set of The Crazy Ones, Sarah Michelle Gellar's new show with Robin Williams. Buffy and Angel also got together again when Sarah Michelle Gellar reunited with former onscreen flame David Boreanaz on Thursday, Feb. 27.

Sarah Michelle Gellar currently stars as Robin Williams ad exec daughter on the CBS sitcom The Crazy Ones. Gellar has also played in the horror classic "The Grunge" and chased spooks in the Scoobie Doo movie, but to she'll always be Buffy Summers from the WB series Buffy the Vampire Slayer. Gellar took to Reddit for an Ask Me Anything session.

A Buffy the Vampire Slayer reunion happened when Sarah Michelle Gellar posted a pic on Twitter with Michelle Trachtenberg and Seth Green. The Buffy reunion happened when they visited the set of The Mad Ones, starting a buzz of rumors that they might get back together to appear on the show.

Willow, played by Alyson Hannigan, didn't show for the Sunnydale High School reunion, but Buffy fans are already speculating on a Robin Williams/Seth Green duet.

Sarah Michelle Gellar also took part in a Reddit question session with billion Buffy the Vampire Slayer fans to talk about her favorite Buffy episodes, sleeping with a stake and whether she preferred Spike or Angel.

Sarah told the Reddit masses that  favorite Buffy the Vampire Slayer episodes were "The Prom," "'Hush" and "The Body."

Speaking about "The Prom", Gellar said "I thought it just encapsulated the show so well. So beautiful and heartbreaking."

Gellar said "Hush" was "Not just the scariest episode we've ever done, but the challenge to do a silent episode - I thought it would be easy, but it was way harder."

Explaining "The Body", Gellar said "Beyond difficult and heart-wrenching to shoot. I don't know if many people know this, but my entire first scene was all done in one take."

On the Reddit AMA, Sarah Michelle Gellar sidestepped the question of whether she preferred Angel and Spike. But it seemed like Buffy was hot for Spike, because

Angel is too sad and drags everyone down into his sadness. Spik was funny.

But when Angel turned bad, Gellar says, "Ohhhh! I loved a couple. When Angel turned bad. Physically I think the scariest were the guys from Hush. And also Camden Toy, I can't think of his character's name right now. And I also liked it when I was the bad guy. And while we're on this topic, I remember my other favorite episode, even though no one asked: I also liked the body switching episode where I got to play Faith and Faith got to play Buffy."