'Buffy' Turns 20

"Buffy the Vampire Slayer" continues to slay 20 years after premiering on March 10, 1997. (Photo By Getty Images)

"Buffy the Vampire Slayer"

Clockwise from top left: Alyson Hannigan as Willow Rosenberg, Charisma Carpenter as Cordelia Chase, Sarah Michelle Gellar as Buffy and Nicholas Brendon as Xander Harris in "Buffy The Vampire Slayer." (Credit: Getty Images / Handout)

"Buffy" Turns 20

David Boreanaz as Angel, Sarah Michelle Gellar as Buffy and Nicholas Brendon as Xander Harris in the television series 'Buffy The Vampire Slayer.' (Credit: Getty Images/Handout)

"Buffy" Turns 20

Buffy and Angel forever! (Credit: Getty Images / Handout)

"Buffy The Vampire Slayer"

"In every generation there is a chosen one..." Sarah Michelle Gellar as Buffy Summers in the television series, "Buffy The Vampire Slayer." (credit: Getty Images/Handout)

Sarah Michelle Gellar

After the show wrapped in 2003, Gellar continued to act and also co-founded Foodstirs, a DIY baking kit and subscription service for kids. (Photo by Michael Kovac/Getty Images for GILT)

David Boreanaz

David Boreanaz stole our hearts as "Angel," who got his own spinoff series from 1999 to 2004. (credit: Getty Images/Handout)

2017 Winter TCA Tour - Day 7

Boreanaz has starred as Seeley Booth in the TV series Bones, which is in its 12th season. (Photo by Frederick M. Brown/Getty Images)

Alyson Hannigan

Alyson Hannigan as Willow Rosenberg (credit: Getty Images/Handout)

Alyson Hannigan

Alyson Hannigan went on to star as Lily Aldrin in the hit sitcom "How I Met Your Mother." (Photo by Frederick M. Brown/Getty Images)

Nicholas Brendon

Nicholas Brendon as Xander Harris (credit: Getty Images/Handout)

Nicholas Brendon

Nicholas Brendon portrayed Kevin Lynch in the crime drama Criminal Minds and has been writing on the Buffy Season 10 comic book since 2014. (Photo by Araya Diaz/Getty Images for Ms. In The Biz)

Anthony Stewart Head

Anthony Stewart Head as Rupert Giles, Buffy's watcher (credit: Getty Images/Handout)

Anthony Stewart Head

Anthony Stewart Head has also starred in "Merlin," "Little Britain" and in BBC Radio 4's "Cabin Pressure." (Photo by Jesse Grant/Getty Images for WIRED)

James Marsters

James Marsters as Spike (credit: Getty Images/Handout)

James Marsters

James Marsters went on to play in other sci-fi roles including "Smallville" and "Torchwood.". (Photo by John Shearer/Getty Images for EW)

Amber Benson

Amber Benson as Tara. (Photo by Online USA)

Amber Benson

Amber Benson has directed, produced and starred in her own films. (Photo by Imeh Akpanudosen/Getty Images for TDOSLWH)

Charisma Carpenter

Charisma Carpenter as the original mean girl, Cordelia. (credit: Getty Images/Handout)

Charisma Carpenter

Actress Charisma Carpenter went on to have roles in "Charmed" and "Veronica Mars." (Photo by Michael Kovac/Getty Images for AltaMed)

Emma Caulfield

Emma Caulfield as Anya. (Photo by Online USA)

Emma Caulfield

After Buffy, actress Emma Caulfield most notably starred in the horror flick "Darkness Falls." (Photo by David Livingston/Getty Images)

Michelle Trachtenberg

Michelle Trachtenberg as Dawn. (Photo by Online USA)

Michelle Trachtenberg

Actress Michelle Trachtenberg has appeared in several films and appeared as Georgina Sparks in the hit show "Gossip Girl." (Photo by Alberto E. Rodriguez/Getty Images)

Marc Blucas

Marc Blucas as Riley. (Photo by Online USA)

Marc Blucas

After Buffy, Blucas appeared in several films including We Were Soldiers and First Daughter. (Photo by Charley Gallay/Getty Images for WGN America)

Seth Green

Seth Green played Oz (Photo by Brenda Chase Online USA, Inc.)

Seth Green

Seth Green voices Chris Griffin on "Family Guy," and has also appeared in several movies including "The Italian Job" and the "Austin Powers" series. (Photo by Frederick M. Brown/Getty Images)