For the lead actor in a TV series not to have input into how they look would be rather odd. They're the star of your show -- you want them to be comfortable. (We've been hearing a lot recently about how Jodie Whittaker was involved in picking out her costume for Doctor Who, picking something that would be comfortable and practical to wear for several years as well as conveying the image and profile she was looking for.)
Fair enough, she actually popped into my head while I was thinking about this, too. Plus the fact that she was even asked what her favourite biscuit is for the newly-added biscuit dispenser on her TARDIS!
