Marsh, formerly of TF1 International, will be based in both Paris and London and report to StudioCanal international sales executive vice president Harold Van Lier. She will also work closely with Optimum's Will Clarke on UK-based productions.
Of Marsh, Van Lier told Screen, 'I am more than thrilled to have Anna joining our team. Her experience, hunger and thoroughness are a perfect match to our ambitious plans internationally.'
Clark added: 'Anna is an extremely talented salesperson with a great knowledge and experience of the international marketplace. We are delighted to welcome her to the team and look forward to working with her in the coming months.'