UK 
Derek Jacobi
Best known for his stage work, Sir Derek Jacobi was a founding member of the Royal National Theatre and most recently collaborated with Kenneth Branagh on his Garrick Theatre production of Romeo and Juliet in which he played Mercutio. Jacobi has previously worked with Branagh on Cinderella, Hamlet, Dead Again and Henry V. Jacobi appeared as the title role in King Lear and as Malvolio in Twelfth Night for which he won an Olivier Award.
Educated at St. John's College, Cambridge, Sir Derek Jacobi was knighted in 1983 for his services to the theatre and was honoured as a Knight First Class of the Order of the Danneborg (Danish Knighthood) in 1989.
In Murder on the Orient Express Derek Jacobi plays Ratchett’s trusted butler – a man who appears to be entirely obedient and subservient - very English, and very polite but with a no-nonsense demeanour.
Talking about the Queen of Crime, Jacobi said:
You read Agatha Christie to try and beat her, to work out who did it and ten times out of ten you get it wrong. She always comes up with the one person that you didn’t think of.
