What do you do when you oreder fabric to make a Marie Antoinette dress but you get the wrong colour? Particularly if that colour happens to be TARDIS blue? I don’t follow the cosplay scene but apparently Kelldar is a big name in it. She’s made a lovely TARDIS/Marie Antoinette crossover dress, you can even see inside the TARDIS!
Here it is again with a guy in a TARDIS suit photo bombing her: