He rose to prominence starring in the film "Naked" (1993), for which he won the Cannes Film Festival Award for Best Actor. His most commercially successful roles to date have been Remus Lupin in the "Harry Potter" film series (2004–2011) and Sir Patrick Morgan / Ares in "Wonder Woman" (2017). Other notable film appearances include "James and the Giant Peach" (1996), "Dragonheart" (1996), "Seven Years in Tibet" (1997), "Kingdom of Heaven" (2005), "The Boy in the Striped Pyjamas" (2008), "War Horse" (2011), "The Theory of Everything" (2014), "Anomalisa" (2015), and "I'm Thinking of Ending Things" (2020). He will appear in "Avatar 3" (2024).