Millie Bobby Brown doesn't know 'how to react' to people her own age.

The actress has admitted she sometimes doesn't know "how to react" to people her own age because she grew up surrounded by adults on TV and film sets. During an interview for the Happy Sad Confused podcast on Monday, host Josh Horowitz asked the British actress whether she felt as if she missed any major life milestones, while playing the character of Eleven on Stranger Things when she was just 11 years old. In response, Millie declared, “Socialisation.” “Sometimes when fans come up to me, they'll be like 'Millie!' and I'll be like 'Aaaah!'" she shared.