I think is lovely and after the film lots of people will recognize it a distinct from Emilie or Emily.

Personally I wouldn't go with he accent as you are not French purely because when typing rather than writing most people here will drop it anyway. We know a gorgeous little girl called A*n*a*ë*l*l*e (her mum is French - think Anna Elle for pronunciation) and I do try to always include the two dots, but on phones etc is harder.

People will always mix things up though - DD is Cerys people think is Paris (which makes me laugh as anyone who knows me would know that there is no way that Paris is a name I personally would choose).