Gained recognition as the young Obi-Wan Kenobi in the Star Wars prequel trilogy. He has also starred in such films as Big Fish, Beginners, Moulin Rouge and Trainspotting. He was cast as Lumiere in the 2017 film Beauty and the Beast and later as Black Mask in the Suicide Squad spin-off Birds of Prey.
While attending the Guidhall School of Music and Drama, he gained the leading role in Lipstick on Your Collar. He made his film debut as Alvarez in the 1994 movie Being Human.
He was voted the 36th best actor of all time by Empire magazine in 1997.
His uncle and aunt, Denis Lawson and Sheila Gish, are also actors. He married Eve Mavrakis in 1995 and he has four daughters, Clara, Esther, Anouk and Jamyan; he filed for divorce in 2018. In November 2017, he went public with his relationship with actress Mary Elizabeth Winstead. Their son Laurie was born in 2021.