In The Stranger Things Series :
In real life:
Noah Schnapp (October 3, 2004 in Skirdale, USA); He is an American actor who started his career in 2015. He is best known for his role as Will in the science fiction series Strange Things.

Schnapp was born in Skarsdale, New York from Mitchell and Karen Chanab. He has a twin sister called Chloe. The Shannab family is from Montreal, Quebec, Canada, has Canadian citizenship, and is from a Jewish family.
Age : old.
Attribution - Sources - licenses