Best known for playing Sheldon Cooper in Young Sheldon, Ziggy Chapman in Big Little Lies, and providing the voice of Shaggy in Scoob!
Films
- Scoob!Shaggy Rogers (voice)2020
- The Glass CastleBrian Walls (age 8)2017
- Our Souls at NightJamie Moore2017
TV shows
- Young SheldonSheldon Cooper2017–2024
- Big Little LiesZiggy Chapman2017–2019
- Law & Order: Special Victims UnitTheo Lachere2016
- The Night OfGilberto (child)2016
- The Crown Season 1Prince Charles (age 8–9)2016
- Modern FamilyEvan (child)2016
- A Million Little ThingsSheldon Cooper (cameo)2018
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About Iain Armitage
Iain Armitage is an American actor who rose to fame as a child star for his portrayal of the young Sheldon Cooper in the CBS sitcom Young Sheldon. He also received critical acclaim for his role as Ziggy Chapman in the HBO drama series Big Little Lies, and has voiced characters in animated films such as Scoob!.
FAQs
Is Iain Armitage really a theatre critic on YouTube?
Yes, before acting full-time, he ran a popular YouTube channel called ‘Iain Loves Theatre’ where he reviewed Broadway and West End shows from a child’s perspective.
Did Iain Armitage win any awards for Young Sheldon?
He received multiple nominations, including a Critics’ Choice Television Award for Best Actor in a Comedy Series and several Young Artist Awards, winning the latter for his performance.
Is Iain Armitage related to any famous actors?
His mother is actress and theatre producer Euan Morton, but his father is not in the industry. He has no famous relatives that are widely known.
What was Iain Armitage’s first acting role?
His first credited TV role was in 2016 on Law & Order: Special Victims Unit, but his breakthrough came later that year in Big Little Lies.
Will Iain Armitage appear in the Georgie & Mandy’s First Wedding spinoff?
As of 2025, Iain Armitage has not been confirmed to appear in the Young Sheldon spinoff series, though fans hope for cameos.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026