Kathryn Hahn recalls improvising risqué Step Brothers scene: 'That came from the deep recesses of a recovering Catholic'

Before her journey down Witches' Road as Marvel's Agatha Harkness, Kathryn Hahn memorably told John C. Reilly she wanted to "roll him into a little ball and shove him into her vagina" in Step Brothers.

Hahn revisited the 2008 comedy on the latest episode of Jesse Tyler Ferguson's Dinner's On Me podcast, revealing that the risqué line in question was improvised. Director Adam McKay, who penned the script with lead stars Reilly and Will Ferrell, "wrote something genius and hilarious," said Hahn, but also encouraged actors to "just roll" with it in terms of improv.

"That whole scene when I tell him I'm gonna shove him in my vagina. Kids, I hope you're listening. That was all not really in the script," said Hahn, quipping, “I mean, that came from the deep recesses of a recovering Catholic. I always take it on.”

Hahn played Alice, the wife of Adam Scott's antagonist Derek, also a stepbrother of Reilly's character Dale, in the comedy. The scene in question (below) comes after Dale punches Derek in the face, much to the pleasure of Alice, who is deeply unhappy in her marriage.

Want more movie news? Sign up for Entertainment Weekly's free newsletter to get the latest trailers, celebrity interviews, film reviews, and more.

Another memorable scene features Dale and Alice plotting Derek's murder, and much of that, too, was improvised, shared Hahn. "Like we went down the darkest rabbit [hole]."

In the film, Reilly and Ferrell starred as two immature grown men whose worlds are flipped upside down after their parents marry, forcing them to become stepbrothers and roommates. “I mean, that was such a specific time in comedy," said Hahn of the era.

Several years on, and thanks to her role as Agatha in WandaVision and spin-off Agatha All Along, Hahn is enjoying what has been dubbed a Hahnissance. "I mean, you, have you heard the term Hahnissance?" asked Ferguson.

"Yes, I have, said Hahn. "It's so crazy."

Of finding work in Hollywood in her 50s, Hahn said, “Everyone had told me that after you have kids, and also after being 40, that it's basically going to be harder and harder and harder as a woman. And I just found the opposite to be true. Like I just kept willing— I think it's more and more [opportunities]."

Hahn also said that "never in a million years" did she imagine she would ever be in a Marvel project. "I didn't really know Marvel," she admitted. "My kids loved it, so I'd see it through them. And I always knew that they got these incredible actors. So when they asked me to do the Witch in WandaVision, I mean, that was ridiculous." 

Listen to Hahn's podcast episode in full above.