Robert Boyd Holbrook (born September 1, 1981) is an American actor. He made his acting debut in the 2008 Gus Van Sant film Milk and had his breakthrough portraying DEA agent Steve Murphy in the Netflix television series Narcos (2015–2016).

His acting credits include the television programs Hatfields & McCoys (2012), The Sandman (2022–2025), Justified: City Primeval (2023), The Morning Show, and the films Little Accidents (2014), The Skeleton Twins (2014), A Walk Among the Tombstones (2014), Logan (2017), The Predator (2018), O.G. (2019), Vengeance (2022), Indiana Jones and the Dial of Destiny (2023), The Bikeriders (2023), and A Complete Unknown (2024).