How Old Are The Characters In Big Mouth

You know that feeling when you’re watching a show and suddenly realize you have no idea how old the characters are supposed to be? It’s like seeing someone you knew in high school at the grocery store—are they your age? Older? Did puberty just really hit them different? That’s exactly how I felt diving into Big Mouth, the wonderfully awkward and hilariously crude cartoon about growing up.

So, how old are these kids? The core gang—Nick, Andrew, Jessi, and Missy—are all seventh graders, which in most of the US means they’re 12 to 13 years old. They’re hovering in that weird, sweaty space between childhood and adolescence, where your voice cracks during a spelling test and your armpits smell like a science experiment gone wrong. Think back to that age: you probably felt like a giant one day and a baby the next. These characters live that every episode.

Why it matters (beyond being a trivia fact)

Care about this because it makes the show’s chaos feel real. When Andrew has a panic attack over his first boner, or Jessi gets her period in the middle of a school play, it’s not random shock humor—it’s what actually happens to 12-year-olds. It’s like remembering that kid in your class who cried because someone looked at them wrong. We’ve all been there, just with fewer talking pubic hair monsters.

The ages also explain why the Hormone Monsters keep showing up. At 12 or 13, your body is basically a haunted house—everything is spooky, loud, and you can’t find the light switch. Nick’s confusion about girls and Andrew’s obsession with sex aren’t weird; they’re just the natural result of being a late-blooming middle schooler. It’s the same reason you might’ve written a love letter in math class and then thrown it out because you were too embarrassed.

Big mouth characters zodiac signs 60 photos - Youhoroscope.com

What about the other kids?

You’ll notice some characters are slightly older or younger. Jay, the chaos gremlin, is also 12-13, but his older brother Val and the "Depression Kitty" character are more like 14-15. That two-year difference in middle school feels like a decade. Remember how ancient a high school freshman looked when you were in seventh grade? Same energy. And Coach Steve? He’s a grown man with the emotional intelligence of a 10-year-old, which explains why he’s so terrible at everything. It’s like that one adult at your family reunion who never quite grew up.

The genius is that Big Mouth doesn’t let the kids act like mini adults. They’re still scared, selfish, and utterly clueless—just like you were at 12. When Missy says something awkward or Nick freezes up at a party, you can almost hear your own middle school self cringing. It’s comforting to see that everyone’s puberty was a dumpster fire.

Big Mouth Cast at Seth Darcy-irvine blog

So, should you care?

Yes, because knowing their ages turns the show from "weird cartoon about puberty" into a shared memory vault. It’s like laughing at an inside joke with your own past. Next time you’re watching Andrew melt down over a zit, just smile and think: Yep, that’s exactly how it felt at 12. And if you didn’t have that exact experience? Well, you probably knew someone who did. That’s the magic—Big Mouth reminds us we were all a little ridiculous and that’s perfectly human.

Now go watch an episode and give yourself a break. You survived seventh grade. These kids are just trying to do the same.