Getty Images, Disney+, Casey Hollister/E! Illustration
As every fan knows, it was "Agatha All Along," with Hahn's fan-favorite villain proving to be one of the most delicious and devious additions to the Marvel Cinematic Universe. And as much as we all delighted in watching the 47-year-old star stir up trouble for Wanda (Elizabeth Olsen) and still sing her catchy theme song, no one loved Agatha Harkness more than Hahn herself.
"I am nostalgic for it because it was such fun, hard work," Hahn told E! News in a phone interview just one week after WandaVision's finale. "Of course, it was one of the hardest things I've ever done, but it was also one of the most meaningful."
Already known for her scene-stealing comedic turns in Step Brothers, Bad Moms and Parks and Recreation and her critically acclaimed performances in more dramatic fare like Mrs. Fletcher and I Know This Much Is True, Hahn found her breakout role in the centuries-old witch, sparking headlines and discussion of a Hahnaissance, nearly 20 years after her film debut in 2003's How to Lose a Guy in 10 Days.
While WandaVision's creative team didn't initially craft the role with Hahn in mind, once they discovered the Transparent star had just had a general meeting with Marvel, showrunner Jac Schaeffer told E! News it felt like fate.
"It was one of those things where you're like, how did we ever function without her?" Schaeffer said. "Like, how did like how do we ever like have the gall to think that that Agatha could exist without Kathryn Hahn? It was just so perfect."
So perfect, in fact, that Hahn's performance—or should we say dual performances, one as Agatha and one as nosy neighbor Agnes?—launched an iconic meme (we'll get to the wink later), a thousand theories and well over one million streams of a little theme song called "Agatha All Along."
"It just blew my mind," Schaeffer admitted of the tune's success, charting on iTunes and Billboard's charts. "And so I loved the song and I knew that would be great. I didn't know that it would be a bop and I didn't know that people would remix it. That was a shock, but then once Kathryn was legitimately charting, I'm like, well, yeah, it's Kathryn Hahn. She's gonna be, like, you know, above [Justin] Bieber on the charts, yes."
And so naturally we were thrilled to get the chart topper on the phone, spending some twenty minutes chatting with her about becoming the year's biggest meme and joining the Marvel Cinematic Universe. Warning: It is possible to love her even more, even if she did kill Sparky, too.
E! News: There's so much talk about the Hahnaissance, right? But when I brought up that I was speaking with you to everyone in my life, they all had a different reference point. So when you see the idea of the Hahnaissance, what is your reaction?
Kathryn Hahn: I mean, at first I immediately think of the McConaissance, which is the first 'aissance' I remember reading about. [Laughs.] That blowing my mind for him and that amazing gentleman and his amazing career. And then to hear it called the Hahnaissance and being on the inside of it and just feeling like I'm putting one step in front of the other as an actor, has been pretty trippy, for sure.