Kathryn Hahn says it took her 40 minutes to pee on 'WandaVision' set, but Elizabeth Olsen was 'very patient' with her

• Kathryn Hahn took 40-minute pee breaks on the "WandaVision" set because of her detailed costume.
• The star made the surprising confession at Variety's Power of Women event.

Kathryn Hahn first made her Marvel debut in 2021's "WandaVision," as the villainous witch, Agatha Harkness, who manipulates Wanda Maximoff (Elizabeth Olsen) to steal the power of the Scarlet Witch for herself. And Hahn recently praised her costar for being "very patient" with her while she took 40-minute pee breaks.

Yes, the actor really took that long to go to the bathroom — but there's a very good reason why.

Speaking at Variety's "Power of Women" event, Hahn explained that her detailed costume took a long time to get out of.

Hahn said: "She was very patient with me as it took me like a solid 40 minutes to 10-one which ... is to urinate in the movie business." She added: "I have a lot of costume on and a very small bladder."

"WandaVision" was the first TV series produced by Marvel Studios to arrive on Disney+ and followed Wanda as she processed the overwhelming grief and trauma in her life through the lens of classic sitcoms, like "I Love Lucy," "Bewitched," "The Brady Bunch," and "Malcolm in the Middle."

Because this was Hahn's first foray into the MCU, she praised Olsen for guiding her through the stuntwork and special effects.

Hahn said: "First of all, she was my intro into this Marvel family and she very generously walked me through blasts and wires and stunts and finding truth on an X on a green screen. I was used to talking to other people."

The series also heavily relies on Wanda's MCU backstory, including her history with the evil organization, Hydra, her relationship with Vision (Paul Bettany), and his subsequent death at the hands of Thanos (Josh Brolin) in "Avengers: Infinity War."

But Olsen was also on hand to explain the whole journey to Hahn, as the actor said: "She was so patient with all of my questions: 'Who was Ultron? What is that glove with all the gems on it?'"

Hahn's appearance in "WandaVision" isn't the last time that audiences will see her in the Marvel Cinematic Universe because she's getting her own Disney+ series which will undoubtedly explore Agatha Harkness in closer detail.

San Diego Comic-Con 2022 saw a horde of TV announcements from Marvel Studios including the new name for the series led by Hahn, titled "Agatha: Coven of Chaos."

Plot details are under wraps for the moment, but the show will arrive on Disney+ towards the end of 2023.