THEN & NOW: What happened to the stars of 'Buffy the Vampire Slayer,' 20 years later

Hannigan married "Buffy" costar Alexis Denisof in 2003, a few months before the show ended, but she didn’t have to wait too long to find her next hit TV series. Starting in 2005, Hannigan starred in the beloved sitcom “How I Met Your Mother” as Lily Aldrin for nine years. Since the show's end in 2014, Hannigan has taken a step back. For one season in 2016, she hosted “Penn & Teller: Fool Us,” a competition series in which aspiring magicians show their best tricks to the famous duo. She was also tapped to star in the TV remake of “The First Wives Club,” but the project has been shelved for now.

Like Gellar, Hannigan has also focused on a hobby that involves her two children: crafting. She’s such a crafter that she converted her Los Angeles home’s guesthouse into a hyper-organized crafting room.

You can tell she’s really into it:

Over the course of seven years, Brendon appeared in 21 episodes of “Criminal Minds” as Kevin Lynch, but beyond that, he's unfortunately led a tumultuous life after “Buffy.”

Since 2010, he has been arrested several times. In September 2015, he was arrested after an alleged domestic dispute with his girlfriend and was charged with third-degree robbery along with two counts of criminal mischief and one count of obstruction of breathing. He's also been arrested on a charge of public intoxication.

In August 2015, he walked off the set of “Dr. Phil,” writing later in a Facebook post that he felt Dr. Phil “went for the jugular, talking about some of my recent mistakes, with no build up. I felt that he wanted me to lay the darkest parts of myself on national TV right from the start, and I’m not willing to do that.”

Brendon has spent time in rehab and admitted to a relapse in mid-2016.

English actor Head was already established by the time “Buffy” began in 1997, and he hasn’t really stopped working. He has appeared in many British TV shows, including “Little Britain” and cult classic “Merlin.” You’ve also seen him in “Percy Jackson: Sea of Monsters,” a few episodes of “Warehouse 13,” “Galavant,” and Syfy’s “Dominion.”

As you already know from the critically acclaimed “Buffy” musical episode, Head has quite a voice. Along with his solo album “Staring at the Sun,” you can listen to his killer version of “Sweet Transvestite” from “The Rocky Horror Picture Show,” of which he once starred in a London West End revival in the early 1990s. Rock on, Giles.

Boreanaz hasn’t left your TV since he first showed up on “Buffy” in 1997.

The star of Buffy’s love life left the series to lead his own spin-off, “Angel,” from 1999 to 2004. The following TV season, Boreanaz began starring as Seeley Booth in “Bones,” which after 12 seasons is finally coming to a close on March 28.

Beyond that and a great cameo on “Family Guy,” Boreanaz enjoys the simple things in life — namely, hockey, and especially the Philadelphia Flyers, his hometown team.

Some fans who have never seen Marsters in anything besides “Buffy” and “Angel” might be surprised to know the actor isn’t British. So when you see him in “Torchwood,” “Smallville,” “Caprica,” and “Witches of East End,” don’t be surprised when he lacks the platinum locks and London accent.

His latest venture “ViDiOTS” is a guerilla-style series that he stars in as he travels and plays video games with some famous friends. Episodes are available with a subscription on Vimeo.

While Joyce’s fate is still too painful to even think about, it’s nice to know Sutherland is doing well. (But no, she’s not related to Donald or Kiefer Sutherland.) She didn’t do much after “Buffy,” but since joining Twitter in 2014, seems to really enjoy the platform, as she often replies to tweets from fans.

Classic, Joyce.

And this adorable interaction with Sarah Michelle Gellar is too precious for words.

After taking Cordy to “Angel” for several seasons, Carpenter appeared in many smaller roles, including ones in “Veronica Mars,” “The Expendables,” The Expendables 2,” “Greek,” and “The Lying Game.”

She really just exudes Cordelia on her Twitter and Instagram.

From guest spots to prolific voice work, Green’s resume is jam-packed. Most notably, you can hear him as Chris on “Family Guy” and Seth MacFarlane’s other animated shows. Green also cocreated the five-time Emmy-winning (yes, you read that right) stop-motion sketch-comedy series “Robot Chicken,” in which he voices dozens of characters.

Most recently, Green guested on “Broad City” and “Crazy Ex-Girlfriend.” He also provided the voice for King Kong in “The LEGO Batman Movie.”

Somewhere, Oz is just shrugging and saying, "Cool."