Just so you know, the way IMDB works is that it's open-source. Typically speaking, when something is in production, people add *themselves* to a project. (Or agents might add their clients.) Sometimes someone from publicity will add a big name star to help hype up the film, but no one really pays any attention to the IMDB page until after the project is completed. Then someone from publicity goes through with the official cast list and the official credit (crew) list and adds and confirms everything in one go. The fact that there aren't any other Amis listed by name yet really doesn't mean anything at all.
Also, if I wanted to I could go in and make it say that I played Bahorel. It's like Wikipedia that way; anyone can edit until the final credit list comes out and a producer or someone associated with the production marks the credit list as "complete."
"Quand vous aurez besoin de Bahorel, capitaine, Bahorel est là! Je sais faire trébucher tous les chevaux du garde-corps avec une ficelle... Rien qu'une petite ficelle. Enfin, pensez à Bahorel du Café Musain!"