This Robert Sheehan fan-art contains
costume d'affaires, costume d’affaires, costume, costume de vêtements, costume simple boutonnage, costume à bretelles simples, and costume croisé simple.
I don't know how much he is in the movie but I'd still go just to see him. For the trailer he's in it at 1.30 - 1.33, it's not much but I freaked when I recognized him!