- Edward Oxford in Victoria & Albert (2001)
- The voice of Dobby in Harry Potter and the Chamber of Secrets (2002)
- Smee in Finding Neverland (2004)
- Truman Capote in Infamous (2006)
- Duke of Clarence in Amazing Grace (2006)
- Waddington in The Painted Veil (2006)
- Ollie Weeks in The Mist (2007)
- Daniel Quilp in The Old Curiosity Shop (2007)
- Barton Snode in City of Ember (2008)
- Swifty Lazar in Frost/Nixon (2008)
- Karl Rove in W. (2008)
- Thomas Huxley in Creation (2009)
- Dream Lord in Doctor Who (2010)
- The voice of Dobby in Harry Potter and the Deathly Hollows: Part I (2010)
- The voice of Dobby in Harry Potter and the Deathly Hollows: Part II (2011)
- Claudius Templesmith in The Hunger Games: Catching Fire (2013)
- "I’m told I am gonna be involved. But of course, I don’t quite know how much I’m gonna be involved. I think the theory is that Arnim Zola is gonna come back and, I’m told by people who know much more about the myth of this stuff, that he invents the secret of eternal existence. So, it’s looking good for future films as well. So that character in particular is a good one to get involved with."
- "All I can say about it is that I was pleased to be brought back. I thought I might be--because you'd know better than I do--but Zola finds a way to defeat time and you won't be disappointed with the way that's been treated in the film, that's what I would say."
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