Clifford Vivian Devon Curtis (born 27 July 1968) is a New Zealand actor. His filmography includes such films as Once Were Warriors (1994), Three Kings (1999), Training Day (2001), Whale Rider (2002), Collateral Damage (2002), Sunshine, and Live Free or Die Hard (both 2007), Dark Horse (2014), for which he won the Asia Pacific Screen Award for Best Actor, Doctor Sleep (2019), Avatar, and Avatar: The Way of Water (2022). Among his television roles are the NBC series Trauma and the ABC series Body of Proof and Missing. From 2015 to 2017, he played Travis Manawa in the AMC horror series Fear the Walking Dead.

He is a co-owner of the independent New Zealand production company Whenua Films.