Stranger Things: The Movie is a 2021 movie based on the Netflix web television series, Stranger Things.
On October 1985, Eleven stays with the Byers family to move in with them as they tell them the story on how Eleven met the Party. 36 years later, Mike, Lucas, Dustin, Max, Steve, Robin, and Nancy team up with Eleven and the Byers kids to save the world from the forces of evil.
- Mark Wahlberg as Mike Wheeler
- Finn Wolfhard as Young Mike Wheeler
- Chris Tucker as Lucas Sinclair
- Caleb McLaughlin as Young Lucas Sinclair
- Jared Leto as Dustin Henderson
- Gaten Matarazzo as Young Dustin
- Michael C. Hall as Will Byers
- Noah Schnapp as Young Will Byers
- Rosemarie DeWitt as Jane "Eleven" Wheeler (née Ives-Hopper)
- Millie Bobby Brown as Young Jane "Eleven" Ives-Hopper
- Darby Stanchfield as Maxine "Max" Sinclair (née Mayfield)
- Sadie Sink as Young Maxine "Max" Mayfield
- Lauren Graham as Nancy Byesr (née Wheeler)
- Natalia Dyer as Young Nancy Wheeler
- Matthew Fox as Steve Harrington
- Joe Keery as Young Steve Harrington
- Josh Brolin as Jonathan Byers
- Charlie Heaton as Young Jonathan Byers
- Jeri Ryan as Robin Buckley
- Maya Hawke as Young Robin Buckley
- Jill Marie Jones as Erica Sinclair
- Priah Ferguson as Young Erica Sinclair
- Kristen Bell as Holly Blake (née Wheeler)
- Idina Menzel as Suzie Henderson
- Gabriella Pizzolo as Young Suzie
- Dax Shepard as Ryan Blake, Holly's new husband
- Kingston Foster as Alice Blake, the daughter of Holly Wheeler
- Zach Callison as Raymond Wheeler, the daughter of Mike and Eleven. Like his siblings, he has telekinesis.
- August Maturo as David Wheeler, the son of Mike and Eleven. Like his siblings, he has telekinesis.
- Julia Butters as Evelyn "Eve" Wheeler, the daughter of Mike and Eleven. Like her siblings, she has telekinesis.
- Skylar Gray as Skylar Sinclair, the adopted daughter of Lucas and Max
- Milly Shapiro as Christina "Chris" Henderson, the daughter of Suzie and Dustin
- Amandla Stenberg as Beverly Sinclair, the adopted daughter of Lucas and Max
- Josie Totah as Irene Byers, the daughter of Nancy and Jonathan Byers
- Madisyn Shipman as Paige Wheeler, the daughter of Mike and Eleven. Like her siblings, she has telekinesis.
- Jeremy Shada as James Wallace, Raymond's friend from Hawkins High School who enjoys Raymond's telekinetic powers.
- Kristen and Dax, a real-life couple, play roles of Holly and Ryan Blake.