Mckenna's biggest role this year has been as 14-year-old wife, Esther Keyes, in the hit series, "The Handmaid's Tale." The fourth season of "The Handmaid's Tale" just came out recently, and everyone has been talking about it. One of the biggest talking points has been Grace's powerful, cigarette smoking survivor character. Right off the bat, her character and the lead, June, gain an almost mother-daughter like relationship, which makes audiences cry even more. There won't be any spoilers here, but let's just say it gets crazy.

Now the funny thing is that Grace wasn't allowed to watch the series until she was cast in it! In an interview with Elle, she told them the story, "I was never allowed to watch Handmaid's. I remember wanting to, because my parents really like it. After I got it, my mom's like, 'Well, I mean, okay.' Then we binge-watched all the seasons together." Along with that, she divulged in the same interview, she's had to write about the series multiple times for one of her courses, but never lets it slip that she's in it. "The professor doesn't know I'm in it. I tried not to expose myself," she said.