Played by Iain Armitage
Sheldon is the 9-year-old child prodigy, based on The Big Bang's original leading man.
With a once-in-a-generation mind, Sheldon is light years ahead of his peers.
A miniature genius, he's capable of calculating advanced mathematics and scientific problems.
Although academically gifted, Sheldon lacks social skills, he has trouble reading other people's behaviour.
He also possesses a sense of superiority over everyone around him.
But despite his attitude and his intelligence, Sheldon's heart is in the right place, and he cares deeply for his family.