In mapping outHeartstopperseason 3, creator Alice Oseman knew she needed to include one crucial scene.

“I knew that conversation needed to happen, but sadly it couldn’t be with Nick’s mom.

So I did have a backup plan at that point.”

Heartstopper season 3 Hayley Atwell Season 3

Hayley Atwell as Aunt Diane on ‘Heartstopper’ season 3.netflix

In the comics, Nick has an aunt and uncle, Diane and Richard, who appear briefly.

But what if now, with season 3, they did?

They heard through their casting director thatHayley AtwellofCaptain AmericaandMission: Impossible Dead Reckoningwas interested inHeartstopper.

Joe Locke, Kit Connor Season 3 Episode 3

Charlie (Joe Locke) and Nick (Kit Connor) on ‘Heartstopper’ season 3.netflix

“She didn’t audition.

She’s a very established actress and we knew that she would be amazing,” Oseman says.

It wouldn’t make any sense," Oseman explains.

She admits it was “definitely one of the bigger screenwriting challenges” in reworking it around Diane.

“But I’m really happy with how it all turned out,” she continues.

See the end result whenHeartstopperseason 3 premieres on Netflix this Thursday.