Question: how old are mike and eleven in season 3?
Answer: Millie Bobby Brown Character's age: Eleven was born in 1971, and Season 1 is set in November 1983, making her 12 in Season 1, and a year older at 13 in Season 2, set in October/November 1984. Season 3 is set in July 1985, which means Eleven is either 13 or 14 then.