Who played Joyce Byers in 'Stranger Things'?

Who played Johnny Rose in 'Schitt's Creek'? Who played David Rose in 'Schitt's Creek'? Who played Alexis Rose in 'Schitt's Creek'? In which TV series is Eleven a main character? Who played Steve Harrington in 'Stranger Things'? In which TV series is Steve Harrington a main character? Who played Dustin Henderson in 'Stranger Things'? In which TV series is Dustin Henderson a main character?