The US television series 'The Big Bang Theory' is getting the prequel 'Young Sheldon', which will revolve around the character 'Sheldon Cooper' when he was growing up. Child actor Iain Armitage will star as 9-year-old Sheldon in the series, which will premiere in the 2017-18 season. 'The Jungle Book' director Jon Favreau is directing and producing the first episode.