American actor Iain Armitage is best known for starring as young Sheldon Cooper in the hit CBS sitcom Young Sheldon and for playing Ziggy Chapman in HBO’s Big Little Lies. He began his career as a child theater critic before moving into television and film. As of 2026, at age 17, he stands around 5ft 10in (178 cm).
Iain Armitage Height
- ✔ Multiple public sources verified
- ✔ Visual photo evidence reviewed
- ⚠ Footwear impact explained
- ✔ Posture variation considered
- ✔ Recently updated profile
Quick Facts
- Full Name: Iain Armitage
- Date of Birth: July 15, 2008 (Age: 17 in 2026)
- Height: 5ft 10in (177.8 cm)
- Profession: Actor
- Nationality: American
- Known For: Young Sheldon (Sheldon Cooper), Big Little Lies (Ziggy Chapman)
Iain Armitage Height Prediction
Iain Armitage is a 17‑year‑old American actor best known for starring as Sheldon Cooper on Young Sheldon and playing Ziggy in Big Little Lies. He is currently reported around 5 ft 10 in (177.8 cm), showing noticeable growth in his teen years.
Growth Trend
In earlier teen years, he was estimated around 5′8″, but recent appearances suggest he’s now closer to 5′10″. This growth fits the typical pattern for boys between ages 15 and 17.
Parents’ Heights
Iain’s father, Euan Morton, and mother, Lee Armitage, are both active in the performing arts. Their official heights are not publicly confirmed, so we estimate using average adult male and female heights for projection.
Predicted Adult Height
A common prediction method uses the mid‑parental height formula. With estimated parent heights, we calculate:
- (Father’s height + Mother’s height + 5 in) ÷ 2
- (178 cm + 163 cm + 13 cm) ÷ 2 = 177 cm
Based on this, Iain may reach a final adult height of about 5′10″ to 6′0″ (178–183 cm). This fits well within average height ranges for adult males.
Comparison With Peers
Many male actors of his generation, like Tom Holland or Timothée Chalamet, also fall between 5′8″ and 6′0″. Iain’s height progression places him right in line with that range and likely won’t impact his future roles.
Note: Height predictions are general estimates. Genetics, nutrition, and individual development can always shift outcomes.
