Marinette Dupain-Cheng is an aspiring fashion designer, so of course she seized the opportunity to make costumes for the film her best friend happens to be directing. Simple enough, right? So what if Adrien Agreste is cast in a lead role and seems to have taken an interest in her? No big deal! She can handle it. Although, that Chloe Bourgeois is really starting to work her nerves... Miraculous Movie!AU