Robert Michael Aramayo (born 6 November 1992, Kingston upon Hull, East Riding of Yorkshire, England) is an English actor of Basque descent, active since 2012. He began acting at age seven in a primary school production of Bugsy Malone, joined the Hull Truck Youth Theatre at ten, and in 2011 earned a place at the Juilliard School in New York City. His performance as Alex in a Juilliard production of A Clockwork Orange led to his first film role in Lost in Florence (2017). He is best known for playing young Eddard Stark in seasons six and seven of HBO's Game of Thrones (2016–2017), Rob Hoyle in the Netflix miniseries Behind Her Eyes (2021), and Elrond in Amazon's The Lord of the Rings: The Rings of Power (2022–present, 24 episodes). His 2025 performance as John Davidson in I Swear earned him the BAFTA Award for Best Actor in a Leading Role and the EE BAFTA Rising Star Award in 2026.

His filmography includes Nocturnal Animals (2016, as Turk), Galveston (2018, as Tray), The Standoff at Sparrow Creek (2018, as Keating), Eternal Beauty (2019, voice), Antebellum (2020, as Daniel, with Janelle Monáe), The Empty Man (2020, as Garrett), The King's Man (2021, as Sgt. Maj. Atkins), Dance First (2023, as Alfred Péron), Lilies Not for Me (2024, as Philip Fairfax, also executive producer), Palestine 36 (2025, as Captain Orde Wingate, with Jeremy Irons), and I Swear (2025, as John Davidson, with Peter Mullan). On television he also appeared in Harley and the Davidsons (2016, as William S. Harley), Mindhunter (2019, as Elmer Wayne Henley Jr.), and is set to appear in the HBO miniseries Lewis and Clark.