Emma D'Arcy is about 171 cm tall — roughly 5 foot 7 and a half — across several current public height references. That places Rhaenyra between the shorter and taller people in this House of the Dragon lineup, which is exactly why a common-scale visual is more useful than another list of numbers.
Olivia Cooke is about 165 cm, making her roughly 6 cm shorter than D'Arcy. Fabien Frankel is about 178 cm, around 7 cm taller than D'Arcy. Matt Smith is about 182 cm, and Steve Toussaint reaches about 191 cm — roughly 20 cm taller than D'Arcy.
Those differences can be hard to judge from the series itself because costumes, boots, blocking and camera placement all change apparent scale. The point of this comparison is not to reverse-engineer actors' heights from scenes. It is to place the supported heights on one true scale so the gaps are directly visible.
Cast heights at a glance
| Person | Height | Published evidence |
|---|---|---|
| Emma D'Arcy | 171 cm | Emma D'Arcy - Biography - IMDb |
| Olivia Cooke | 165 cm | Olivia Cooke - Biography - IMDb |
| Fabien Frankel | 178 cm | Fabien Frankel - Biography - IMDb |
| Matt Smith | 182 cm | Matt Smith - Biography - IMDb |
| Steve Toussaint | 191 cm | Steve Toussaint - IMDb |
