Big Mouth Voice Actors: The Talented Cast Behind Characters

Netflix's Big Mouth has become one of the most talked-about adult animated series, praised for its bold humor and unfiltered take on adolescence. But what truly brings the awkward, hilarious, and heartfelt moments to life is its incredible voice cast.

Want to know about Big Mouth voice actors? You're in the right place. In this guide, we'll dive into the talented voice cast behind Netflix's hit animated series, exploring the comedians, actors, and surprise celebrities who lend their voice to the show's awkward teens, mischievous hormone monsters, and more. Ensure to read this guide till the end to meet the stars behind the mic of Big Mouth.

Part 1: Overview of Big Mouth

Big Mouth is a hit adult animated comedy series on Netflix that first premiered in 2017. Created by Nick Kroll, Andrew Goldberg, Mark Levin, and Jennifer Flackett. Set in the suburban lives of a group of teenagers, Big Mouth tackles everything from puberty and relationships to anxiety and self-discovery - all with a raw honesty and sharp comedic edge. The first season of the show premiered on Netflix on September 29, 2017, and the final season was released on May 23, 2025.

Since its release, the show has won many awards and earned widespread praise for its fearless storytelling and sharp humor. Big Mouth has won multiple Annie Awards and Primetime Emmy Awards, including Maya Rudolph's Emmy and more.

Part 2: Big Mouth Voice Actors in 2025

The voice actors of Big Mouth don't just mouth lines; they become their characters. Behind the mic, it's chaos, improv, and a lot of sweating in soundproof booths. Here are some of the most memorable voice actors for Big Mouth:

1. Nick Birch

Nick is a 12-year-old boy who lives in Westchester, New York, and goes to Bridgeton Middle School. He is a late bloomer who has not started puberty yet. He is, however, very eager to start it. Nick is voiced by Nick Kroll, who also co-created Big Mouth. Kroll brings humor and vulnerability to Nick's character, perfectly portraying the confusion and excitement that come with early adolescence.

2. Jessi Glaser

Jessi is a younger teenager who is starting to go through changes. As gruesome as puberty may be, she has the Hormone Monstress to cheer her on and give her advice. Voice actor Big Mouth Jessi is Jessi Klein. A comedian and writer whose dry wit and emotional nuance bring authenticity to the character. Through her voice work, Klein perfectly balances Jessi's confidence, vulnerability, and sharp humor.

3. Miss Foreman-Greenwald

Melissa "Missy" Foreman-Greenwald is one of the main characters in Big Mouth and a close friend of Andrew, Jessi, and Nick. She's an emotional and geeky girl with a big heart who's relatively far behind in terms of physical development. Who are Melissa's voice actors in Big Mouth? Originally voiced by Jenny Slate, Missy's voice acting transitioned to Ayo Edebiri in Season 4, a move that brought even more authenticity to the character.

4. Andrew Glouberman

Andrew Glouberman is one of the two main protagonists of the Netflix series Big Mouth. He is a nerdy thirteen-year-old middle school boy under the manipulation of his hormone monster, Maury Beverly. He is the best friend of Nick Brich. He is voiced by John Mulaney, who also played Ferguson Toddle in Saturday Night Live, Big Jack Horner in Puss in Boots: The Last Wish, and Hello Show.

Part 3: How to Get a Big Mouth Voice Actor Voice in Real-Time?

Big Mouth voice actor has a unique and engaging voice, which is hard to replicate. However, with the help of AI, you can now effortlessly clone the voices of Nick, Jessi, Andrew, and many other characters. HitPaw VoicePea is one of the best real-time voice changers available online, allowing users to transform their voice into any character in real-time. With this tool, users can easily speak as their favorite Big Mouth character during calls, livestreams, or recordings. The standout feature of HitPaw VoicePea is that it is designed with beginner users in mind, offering an intuitive interface and simple setup process that requires no technical expertise. Furthermore, it provides various AI tools, including Text-to-Speech, AI Song Generator, Voice Cloning, and an Amazing Soundboard. These tools let users not only mimic Big Mouth characters in live conversation but also create custom audio clips, sing in their favorite character's voice, and more.

Key Features of HitPaw VoicePea

HitPaw VoicePea is packed with amazing features, making it one of the best AI tools. Here are the top features of this program:

• Amazing Soundboard: One of the best features of HitPaw VoicePea is its built-in soundboard, which takes voice changing to the next level. It offers hundreds of built-in AI voices and effects, which are ready to use, including Nick, Jessi, Andrew, Morgan Freeman, and more.
• Real-Time Voice Changer: With the help of this tool, you can alter your voice during calls, streams, meetings, and more. It supports hundreds of PC programs and games such as Call of Duty, Fortnite, Discord, Zoom, Twitch, Microsoft Teams, and Valorant.
• Noise Reduction: The program also offers AI Noise Reduction capabilities. This feature automatically detects background noises from your audio file and automatically eliminates them without compromising the original quality.
• Intuitive Interface: HitPaw is designed specifically for beginner and non-tech users, featuring a clean, user-friendly interface that's easy to navigate from the very first use. The setup process is straightforward.
• Supported Formats: It allows users to import and export audio files in multiple audio formats such as MP3, WAC, and FLAC.

How to Get Voices of Voice Actors From Big Mouth With HitPaw VoicePea?

With HitPaw, users can effortlessly convert their voice into any character in real-time. Here is how to do it:

• HitPaw VoicePea is compatible with both Windows and macOS. Download, install, and launch this tool on your PC. Navigate to any third-party program such as Discord or Steam and select "HitPaw Virtual Audio" as the input device.

• Navigate to HitPaw and select "Soundboard" from the main interface. Choose your preferred Big Mouth actors' voices. You can customize the shortcut keys for the sound effect according to your requirements.

• Next, enable "Hear Myself" and "Voice Changer" to preview the sound. Activate the "Noise Reduction" feature if you find the background too noisy.

• Once your voice is altered in real-time, you can also adjust the volume of the sound effects according to your needs.

Conclusion

Big Mouth is one of Netflix's top-rated and most talked-about animated shows, and a huge part of its success comes from the incredible voice cast that brings the characters to life. In this guide, we've explored the talented Big Mouth voice actors whose performances make characters truly unforgettable. Plus, we have also introduced you to an AI Voice Changer named HitPaw VoicePea, allowing users to convert their original voice to Big Mouth voices. It offers the voices of Nick, Jessie, Andrew, and more.