Stranger Things Star Millie Bobby Brown on Young Eleven and Whether She Created the Upside Down

In Season 4 of Stranger Things, Millie Bobby Brown coached another girl to play an even younger version

Of the character she has been playing since she was barely 11 years old

Eleven's time as a captive child in Hawkins Lab with Dr. Martin Brenner is depicted through extended flashback sequences set in 1979

Brown performed most of those scenes since Eleven's memories are seen through her eyes

On occasion, Martie Blair ("The Young and the Restless") stood in for Eleven, and her face was digitally replaced by Brown

Brown explained to Variety that she worked closely with Blair on set for those scenes to capture Eleven's movements and reactions

"Let me take you through what I went through, and we'll figure it out together," she says

In order to figure out what was happening and who was playing what, I had to sit down with the Duffer Brothers and Shawn Levy

I decided to play my younger self, and whenever she sees her reflection or recalls a memory, it's her younger self