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The Final Puberty: Everything To Know About The 'Big Mouth' Cast And Their Massive Careers Before Season 8

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The animated world of awkward adolescence is preparing for its final, most hormonal bow, and fans are desperate to know which comedic powerhouses are returning for the final season. As of December 24, 2025, the core cast of the groundbreaking Netflix series Big Mouth is confirmed to return for Season 8, which is set to premiere globally on May 23, 2025. This series, created by Nick Kroll and Andrew Goldberg, has become a cultural phenomenon by tackling the messy, hilarious, and often humiliating realities of puberty head-on, all thanks to the incredible talent of its voice actors. The upcoming final season promises to bring the journey of Nick, Andrew, Jessi, and Missy to a definitive, and likely very awkward, conclusion.

The success of Big Mouth isn't just in its boundary-pushing scripts; it's in the emotional depth and comedic timing delivered by its ensemble. These actors—many of whom are stand-up comedians, writers, and producers in their own right—don't just lend their voices; they bring a lifetime of comedic expertise to their characters, which is why the show resonates so deeply with audiences navigating the chaos of growing up. From the cynical Hormone Monsters to the perpetually confused Coach Steve, the cast is a who's who of modern comedy.

The Core Voices: A Complete Cast Profile and Career Highlights

The main cast of Big Mouth is a tight-knit group of comedians and writers, many of whom have been collaborating for years. Their collective resume is a testament to their topical authority in the world of comedy, making them the perfect team to voice the most relatable and embarrassing moments of puberty. Here is a look at the main voice actors and their most significant roles outside of the show:

  • Nick Kroll (Voices: Nick Birch, Maury the Hormone Monster, Coach Steve, Lola Skumpy, Rick the Hormone Monster, and more): As the co-creator of the series, Kroll is the vocal backbone of the show, voicing multiple key characters. Beyond Big Mouth, Kroll is famous for his sketch comedy series Kroll Show and his role as Rafi in the FX comedy The League. He also co-created and starred in the Broadway hit The Oh, Hello Show with his long-time creative partner, John Mulaney.
  • John Mulaney (Voices: Andrew Glouberman): Mulaney voices Nick's best friend, Andrew, the perpetually anxious and hormone-driven counterpart. Mulaney is one of the most celebrated stand-up comedians of his generation, known for his Emmy-winning specials like Kid Gorgeous, The Comeback Kid, and the highly personal 2023 special Baby J. He also wrote for Saturday Night Live and created the children's musical comedy special John Mulaney & the Sack Lunch Bunch.
  • Ayo Edebiri (Voices: Missy Foreman-Greenwald): Edebiri took over the role of the quirky, intellectual Jessi Glaser in the middle of Season 4, a move that was praised for addressing racial representation in animated casting. Edebiri has since become a global superstar, with her breakthrough role as Sydney Adamu in the critically acclaimed series The Bear, for which she has won a Golden Globe, a Primetime Emmy Award, and multiple Screen Actors Guild Awards.
  • Jessi Klein (Voices: Jessi Glaser): Klein voices the cynical and sardonic Jessi Glaser, a character who often deals with the more serious emotional turmoil of growing up. Klein is a highly respected comedy writer, actress, and stand-up comedian. She is known for her work as a writer and producer, and has appeared on numerous stand-up and talk shows throughout her career.
  • Jason Mantzoukas (Voices: Jay Bilzerian): Mantzoukas brings his signature manic energy to Jay, the sexually exploratory and often chaotic young boy. Mantzoukas is instantly recognizable for his roles as Rafi in The League and the unforgettable Adrian Pimento in Brooklyn 9-9. He is also a co-host of the wildly popular comedy podcast How Did This Get Made?
  • Maya Rudolph (Voices: Connie the Hormone Monstress, Diane Birch, and more): Rudolph's work as the iconic, sassy Connie the Hormone Monstress earned her multiple Emmy Awards. A legendary alumna of Saturday Night Live (SNL) from 2000 to 2007, she is known for her brilliant celebrity impressions, including Oprah Winfrey and Donatella Versace. She also stars in the Apple TV+ series Loot.

The Missy Recasting: A Landmark Moment for the Series

One of the most significant and timely updates in the history of Big Mouth was the recasting of Missy Foreman-Greenwald. The character, who is biracial, was originally voiced by Jenny Slate, a white actress. In 2020, Slate stepped down, stating that "Black characters on an animated show should be played by Black people." This decision was a direct response to the broader conversation about representation and diversity in the entertainment industry.

The role was subsequently taken over by Ayo Edebiri, an actress, writer, and comedian of Barbadian and Nigerian descent. The transition was handled gracefully within the show, with a meta-commentary storyline that saw Missy herself acknowledging her evolving identity. Edebiri’s performance has been universally praised, bringing a fresh, earnest, and deeply funny dimension to the character just as Missy begins to explore her racial identity and self-image more fully.

Expanding the Universe: The Cast's Crossover into 'Human Resources'

The world of Big Mouth expanded its topical authority with the spin-off series Human Resources, which focuses on the lives and workplaces of the creatures who guide humans through life—the Hormone Monsters, Shame Wizards, Lovebugs, and Ambition Gremlins. The crossover cast is extensive, featuring many of the core Big Mouth actors and introducing a roster of new, high-profile entities.

Key Big Mouth cast members who crossed over include Nick Kroll as Maury the Hormone Monster and Maya Rudolph as Connie the Hormone Monstress. The spin-off also introduced an incredible supporting cast, showcasing the depth of talent in the Netflix animated universe:

  • Aidy Bryant as Emmy the Lovebug
  • Keke Palmer as Rochelle the Lovebug
  • Randall Park as Pete the Logic Rock
  • Rosie Perez as Petra the Ambition Gremlin
  • Helen Mirren as Rita St. Swithens (The Shame Wizard)
  • Hugh Jackman as Dante the Addiction Angel

While Human Resources concluded after two seasons, its existence cemented the Big Mouth universe as a major player in adult animation, allowing the main cast to explore the complex emotional landscape of human development far beyond the middle school hallways. It provided a richer context for creatures like the Hormone Monster and Shame Wizard, turning them from simple plot devices into fully realized, albeit monstrous, characters.

What to Expect from the Final Season (Season 8, May 2025)

The anticipation for the final season is immense, especially with its May 23, 2025, release date looming. Season 8 will see the core group of characters—Nick, Andrew, Jessi, Missy, and Jay—continuing to navigate their tumultuous journey into high school. This transition is a major milestone, promising new challenges beyond the familiar territory of middle school, such as driving, more complex relationships, and the ever-present drama of their Hormone Monsters.

The final season is expected to maintain its signature mix of raunchy humor and genuine emotional sincerity, providing closure for the characters and the creatures who have guided them. With the main cast's contracts expiring, and the show's creators stating that the story is simply running its natural course, the upcoming episodes will serve as a definitive farewell to one of Netflix's most celebrated and controversial animated series. The return of every major voice actor ensures that the final season will deliver the authentic, hilarious, and often cringe-worthy experience fans have come to love.

The Final Puberty: Everything to Know About the 'Big Mouth' Cast and Their Massive Careers Before Season 8
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