But who is 19-year-old Romeo’s girlfriend, Mia? Who is Mia Regan? Mia Regan, 19, is a model signed with Storm Models, who has worked with brands like Balmain, Gucci Beauty, and British Vogue. She’s from Chippenham, near Bath, and was scouted at Birmingham Clothes Show. The agency described the 5 ft 10 model as the ‘quintessential millennial muse with a unique Gen-Z approach to fashion and beauty.’