So, what should he play?
Actress Keira Knightley has appeared attempting to play the violin on a US chat show, alongside Michael Bublé and Dave Matthews.
She's better known for her acting roles in movies like Pirates of the Caribbean, Bend It Like Beckham and Pride & Prejudice, but Keira Knightley was forced to put her musical skills to the test on Late Night with Jimmy Fallon yesterday.
As part of a musical, game Knightley was forced to play a rendition of Row Row Row Your Boat on the violin, while musician Dave Matthews attempted to guess which tune she was playing.
The light-hearted game was also played by hist Jimmy Fallon and singer Michael Bublé, who had to play various other instruments including the harp, trumpet, accordion and cello.
The British actress, 27, was appearing on the show to promote her new film, the movie adaptation of Anna Karenina. There are currently no plans for Knightley to take her musical career any further.In the meantime, we recommend a lower bow grip and a more rigid left hand position.