Made acting debut as Kevin Savage in David Hayman's "The Near Room"

Cast as Anthony Balfour in Gillies MacKinnon's "Regeneration"

Had a small part in the HBO WWII miniseries, "Band Of Brothers"

Cast in the PBS miniseries "White Teeth"

Cast as Leto Atreides II in the Sci Fi Channel miniseries "Children of Dune"

Played Paul Bettany's brother in the romantic comedy "Wimbledon"

Played an Irish teenager who has muscular dystrophy in "Rory O'Shea Was Here"

Cast in Stephen Fry's directorial debut "Bright Young Things"

Starred as Steve McBride in an Abbott-written drama series, "Shameless" (Channel 4)

Received widespread recognition playing Mr. Tumnus in the adaptation of the C.S. Lewis fantasy novel "The Chronicles of Narnia: The Lion, the Witch and the Wardrobe"

Played a fictional adviser and personal physician to the former Ugandan dictator, Idi Amin (Forest Whitaker) in "The Last King of Scotland"

Starred in the adaptation of the David Nicholls novel, "Starter for Ten"

Co-starred with Keira Knightley in "Atonement" based on the novel by Ian McEwan; earned a Golden Globe nomination for Best Actor in a Motion Picture Drama

Featured opposite Christina Ricci in "Penelope"; produced by Reese Witherspoon who also co-starred (lensed 2006)

Co-starred as an assassin in the comic book adaptation of "Wanted"