Iain Armitage is an American child actor who received huge fame with the TV serials, Big Little Lies and Young Sheldon, in which he played the role of Ziggy Chapman and Sheldon Cooper respectively.
He was born on 15 July 2008  in Georgia and was brought up in Arlington, Virginia, U.S.
His father, Euan Morton is an actor and his mother, Lee Armitage is a theater producer. His grandfather, Richard Lee Armitage is a former naval officer and United States Deputy Secretary of State.
Iain came into limelight when he started making video theater reviews and posted them on his YouTube channel, Iain Loves Theatre. He got his first break in 2014 in an American TV serial, Impractical Jokers. After that, he has done several TV serials like Law & Order: Special Victims Unit (2017), Big Little Lies (2017-2019), Young Sheldon (2017-2019), etc. He has also acted in some American films like The Glass Castle (2017), Our Souls at Night (2017), I’m Not Here (2017), and Annabelle Comes Home (2019).
Young Artist Award for Best Performance in a TV Series – Leading Young Actor for the TV serial, Young Sheldon