Actor best known for his role as Bilbo Baggins in Peter Jackson's The Hobbit films. He has also starred in The Hitchhiker's Guide to the Galaxy and in the 2003 film Love Actually. In 2014, he began playing Lester Nygaard on the FX series Fargo. In 2018, he appeared in Marvel's Black Panther.
When he was young, he was asthmatic and had to have a surgical operation on his hip.
He starred as Dr. Watson on BBC's hit adaptation Sherlock, for which he won a Crime Thriller Award for Best Supporting Actor in 2012.
He began dating Amanda Abbington in 2000 after meeting her on the set of Channel 4's Men Only. They had a son named Joe and a daughter named Grace together before separating in 2016.