| The Electric State | 2025 | Actress | Michelle |
| Damsel | 2024 | Actress | Elodie |
| Enola Holmes 2 | 2022 | Actress | Enola Holmes |
| Stranger Things | 2016–2022 | Actress | Eleven |
| Godzilla vs. Kong | 2021 | Actress | Madison Russell |
| Enola Holmes | 2020 | Actress | Enola Holmes |
| Florence by Mills by Millie Bobby Brown | 2019 | Actress | Model |
| Godzilla: King of the Monsters | 2019 | Actress | Madison Russell |
| Asesinato en el Hormiguero Express | 2018 | Actress | Millie Bobby Brown |
| The XX: I Dare You | 2017 | Actress | |
| Sigma Feat. Birdy: Find Me | 2016 | Actress | Millie Bobby Brown |
| Grey's Anatomy | 2015 | Actress | Ruby |
| Modern Family | 2015 | Actress | Lizzie (as Millie Brown) |
| NCIS | 2014 | Actress | Rachel Barnes (as Millie Brown) |
| Intruders | 2014 | Actress | Madison O'Donnell (as Millie Brown) |
| Once Upon a Time in Wonderland | 2013 | Actress | Young Alice (as Millie Brown) |
| Damsel | 2024 | Producer | executive producer |
| Enola Holmes 2 | 2022 | Producer | producer |
| Enola Holmes | 2020 | Producer | producer |
| The Tonight Show Starring Jimmy Fallon | 2016–2017 | Soundtrack | performer: "Stranger Things Season 1 Rap Recap" |
| The 69th Primetime Emmy Awards | 2017 | Soundtrack | performer: "Everything's Better on TV" |
| The 74th Annual Golden Globe Awards 2017 | 2017 | Soundtrack | performer: "Another Day of Sun" |
| Dish Nation | 2023–2025 | Self | Self |
| The Drew Barrymore Show | 2022–2025 | Self | Self - Guest |
| Today | 2019–2025 | Self | Self - Guest |
| The Tonight Show Starring Jimmy Fallon | 2016–2025 | Self | Self - Guest |
| IMDb Interviews | 2021–2025 | Self | Self - Guest |
| SmartLess | 2025 | Self | Self - Guest |
| El hormiguero | 2017–2025 | Self | Self - Guest |
| The BRIT Awards 2025 | 2025 | Self | Self |
| Entertainment Tonight | 2017–2025 | Self | Self |
| The 31st Annual Screen Actors Guild Awards | 2025 | Self | Self - Presenter |
| Extra | 2017–2024 | Self | Self |
| LADbible Entertainment TV Series | 2024 | Self | Self |
| Hallo Deutschland | 2024 | Self | Self |
| The Jonathan Ross Show | 2016–2024 | Self | Self - Guest |
| IMDb Originals | 2015 | Self | Self - Guest |
| Collider Ladies Night | 2024 | Self | Self - Guest |
| The Kelly Clarkson Show | 2024 | Self | Self - Guest |
| Access Hollywood | 2019–2024 | Self | Self |
| Glamour Women of the Year Awards TV Special | 2023 | Self | Self |
| BuzzFeed Celeb | 2019–2023 | Self | Self - Guest |
| Late Night with Seth Meyers Podcast | 2023 | Self | Self - Guest |
| Good Morning America | 2017–2023 | Self | Self - Guest |
| WIRED: Millie Bobby Brown Answers the Web's Most Searched Questions Video | 2022 | Self | Self - Guest |
| Megan Thee Stallion Stranger Things Trivia Video | 2022 | Self | Self |
| SAG Foundation Conversations | 2022 | Self | Self |
| Tudum: A Netflix Global Fan Event | 2022 | Self | Self - Host |
| Geeked Week Unlocked: Stranger Things | 2022 | Self | Self - Guest |
| Hot Ones | 2022 | Self | Self - Guest |
| Burning Questions | 2022 | Self | Self - Guest |
| Hollywood Insider | 2021–2022 | Self | Self |
| Youtube Beauty Festival TV Special | 2021 | Self | Self |
| Tudum | 2021 | Self | Self |
| Godzilla vs. Kong: Godzilla Attacks | 2021 | Self | |
| Godzilla vs. Kong: The Evolution of Kong, Eighth Wonder of the World | 2021 | Self | |
| Godzilla vs. Kong - The Beasts Who Would Be King: Godzilla's Foes | 2021 | Self | |
| Godzilla vs. Kong: The Rise of Mechagodzilla | 2021 | Self | Self |
| Nickelodeon Kids' Choice Awards 2021 | 2021 | Self | Self |
| CNN Heroes | 2020 | Self | Self |
| The 14th Annual CNN Heroes: An All-Star Tribute | 2020 | Self | Self - Presenter |
| Mariah Carey's Magical Christmas Special | 2020 | Self | Self |
| Celebrity Page | 2020 | Self | Self |
| AFI Movie Club | 2020 | Self | Self |
| Nickelodeon's Kids' Choice Awards 2020: Celebrate Together | 2020 | Self | Self |
| Bright Minded | 2020 | Self | Self - Guest |
| #KidsTogether: The Nickelodeon Town Hall | 2020 | Self | Self |
| The Best of the Kids' Choice Awards | 2020 | Self | Self |
| Sport Relief 2020 | 2020 | Self | Self |
| The 26th Annual Screen Actors Guild Awards | 2020 | Self | Self - Nominee & Presenter |
| Entertainment Tonight Canada | 2019 | Self | Self |
| Godzilla: King of the Monsters- Millie Bobby Brown: Force of Nature | 2019 | Self | |
| Godzilla: King of the Monsters- Creating Ghidorah | 2019 | Self | |
| Godzilla: King of The Monsters- Ghidorah: The Living Extinction Machine | 2019 | Self | |
| Evolution of the Titans: Creating Ghidorah | 2019 | Self | Self |
| Celebrities Answer the Web's Most Searched Questions | 2019 | Self | Self - Guest |
| The Late Late Show with James Corden | 2019 | Self | Self - Guest |
| Konbini | 2019 | Self | Self - Guest |
| Hollywood First Look | 2019 | Self | Self |
| Lorraine | 2019 | Self | Self - Guest |
| The One Show | 2019 | Self | Self - Guest |
| The Late Show with Stephen Colbert | 2016–2018 | Self | Self - Guest |
| Maroon 5 feat. Cardi B: Girls Like You (Volume 2) | 2018 | Self | Self |
| The 70th Primetime Emmy Awards | 2018 | Self | Self - Nominee & Presenter |
| 2018 MTV Video Music Awards | 2018 | Self | Self - Presenter |
| #ComicConNoFilmmelier TV Mini Series | 2018 | Self | Self |
| Maroon 5 Feat. Cardi B: Girls Like You | 2018 | Self | Self |
| Nickelodeon Kids' Choice Awards 2018 | 2018 | Self | Self |
| The BRIT Awards 2018 | 2018 | Self | Self |
| E! Live from the Red Carpet | 2017–2018 | Self | Self |
| Spheres | 2018 | Self | Narrator (segment "Spheres: Chorus of the Cosmos") |
| 75th Golden Globe Awards | 2018 | Self | Self |
| British Vogue TV Series | 2017 | Self | Self - Guest |
| Total Request Live | 2017 | Self | Self - Guest |
| Build | 2016–2017 | Self | Self - Guest |
| This Morning | 2017 | Self | Self - Guest |
| Live with Kelly and Mark | 2017 | Self | Self - Guest |
| Beyond Stranger Things | 2017 | Self | Self - Guest |
| The 69th Primetime Emmy Awards | 2017 | Self | Self - Nominee |
| 2017 MTV Video Music Awards | 2017 | Self | Self - Presenter |
| CBS News Sunday Morning with Jane Pauley | 2017 | Self | Self - Guest |
| Teen Vogue: Millie Bobby Brown Shows Us 22 Things That Are Stranger Than Stranger Things Short | 2017 | Self | Self |
| Teen Choice Awards 2017 | 2017 | Self | Self - Presenter |
| Variety Studio: Actors on Actors | 2017 | Self | Self - Guest |
| 2017 MTV Movie & TV Awards | 2017 | Self | Self - Performer and Winner |
| MTV Movie and TV Awards 2017 Pre-Show | 2017 | Self | Self |
| The 23rd Annual Screen Actors Guild Awards | 2017 | Self | Self - Winner |
| The Ellen DeGeneres Show | 2017 | Self | Self - Guest |
| The 74th Annual Golden Globe Awards 2017 | 2017 | Self | Self - Performer |
| UNICEF's 70th Anniversary Gala | 2016 | Self | Self |
| Citi: Would You Rather TV Special | 2016 | Self | Self |
| Quotidien | 2016 | Self | Self |
| The 68th Primetime Emmy Awards | 2016 | Self | Self - Performer |
| Young Hollywood | 2016 | Self | Self - Guest |
| Chelsea | 2016 | Self | Self - Guest |
| Access Daily | 2016 | Self | Self |
| Hell's Kitchen | 2016 | Self | Self - Restaurant Patron (as Millie Brown) |
| Dish Nation | 2024–2025 | Archive Footage | Self (archive footage) |
| Entertainment Tonight | 2017–2025 | Archive Footage | Self (archive footage) |
| Access Hollywood | 2016–2025 | Archive Footage | Self (archive footage) |
| TLDR Business TV Series | 2024 | Archive Footage | Jane Hopper (archive footage) |
| The Tonight Show Starring Jimmy Fallon 10th Anniversary Special | 2024 | Archive Footage | Self (archive footage) |
| The Project | 2024 | Archive Footage | Self - Actor (archive footage) |
| The Comments Section | 2024 | Archive Footage | Self (archive footage) |
| Sleepy Waffles: Stranger Things Series Reaction TV Series | 2019–2022 | Archive Footage | Eleven (archive footage) |
| Stranger Things | 2022 | Archive Footage | Eleven |
| Half in the Bag | 2019 | Archive Footage | Self (archive footage) |
| Extra | 2017–2019 | Archive Footage | Self (archive footage) |
| Celebrity Page | 2017–2018 | Archive Footage | Self (archive footage) |
| Hoy nos toca | 2017–2018 | Archive Footage | Self - Stranger Things |
| Live with Kelly and Mark | 2018 | Archive Footage | Self (archive footage) |
| Le fond de l'affaire Podcast Series | 2017 | Archive Footage | Self (archive footage) |
| Good Morning Britain | 2017 | Archive Footage | Self - Stranger Things |
| Breakfast | 2017 | Archive Footage | Self (archive footage) |
| The Late Show with Stephen Colbert | 2016 | Archive Footage | Self (archive footage) |
| No Small Parts | 2016 | Archive Footage | Self (archive footage) |