They Cast the Adult Rhaenyra First, Then Used Her Childhood Photos to Find the Teenage One

Updated 4 weeks ago, July 24, 2026

How House of the Dragon pulled off a seamless recast: by casting the adult Rhaenyra first, then finding a teenage version to match her.

Two different actors play Rhaenyra Targaryen in House of the Dragon, and the switch after the decade time jump barely registers. That’s because it was engineered: they found the teenage version by matching her to the woman already cast as the adult.

Emma D’Arcy was cast as the older Rhaenyra first, then handed casting director Kate Rhodes James a set of photos from their own teenage years. Those pictures became the reference for the search that eventually landed on Milly Alcock as the younger princess.

Emma D'Arcy in a light blue outfit with silver jewelry poses against a sequined backdrop at the House of the Dragon season 3 premiere in London. — Emma D’Arcy, who plays adult Rhaenyra Targaryen in House of the Dragon, at the season 3 world premiere held at the Odeon Leicester Square in London on June 8, 2026. Photo by Richard A. Brooks / AFP via Getty Images.

Season 1 spans years of Targaryen court intrigue. Alcock plays the sharp, rebellious teenage heir through the early episodes, and Episode 6 jumps roughly a decade forward, with D’Arcy taking over as the adult Rhaenyra: a mother, hardened by politics, still fighting a patriarchal realm that keeps trying to sideline her.

Milly Alcock in a white dress with a gold spiked necklace, hair slicked back, at an HBO Max premiere event. — Milly Alcock at the world premiere of “House of the Dragon” held at the Academy Museum of Motion Pictures in Los Angeles on July 27, 2022. Photo by Chris Delmas / AFP via Getty Images.

The physical match holds up because it was built to. Similar bone structure, eye shape and color, plus the silver-white Targaryen wigs and shared costume and makeup language. Posture, gaze, and that quiet “I am the dragon” intensity carry across both performances.

A parallel swap happened with Alicent Hightower, played by Emily Carey and then Olivia Cooke.

TV recasts after time jumps usually pull you out of the story while you adjust to a new face. The Rhaenyra handoff gets ranked among the best modern examples for the opposite reason: the visual continuity is unusually strong without CGI de-aging, and both performances read as two life stages of one person rather than a hard reset.

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