Givenchy Mister Brow Filler. Mister Brow Filler: a filler to naturally and evenly structure your brows. Mister Brow Filler fills in any sparse areas and flawlessly shapes the brows. Its fluid, quick-drying formula instantly dries down to a powder finish on application. The curved brush follows the eyebrow?s natural shape, for an intuitive application even for beginners!