Booking a hairdressing appointment asap! - by Faye Couros 05 Apr 2021 Aussie darling Mia Hewitt has totally got us forgetting all about our blonde ambitions with her chocolate brunette transformation. WATCH: Bec and Mia Hewitt are mum/daughter goals. Mia's stylish new look was unveiled over the weekend by her actress mum Bec Hewitt, who posted a rare new snap of her three children - and fans were quick to notice the 15-year-old's transformation. The oldest child of tennis champ Lleyton Hewitt has convinced us that our bleach fatigued hair needs to embrace the darker, more sultry brunette vibe to see us through 2021.