Dea Matrona might look like an apparition straight from Almost Famous, but don’t be fooled: there’s nothing “almost” about this group. They’re set for superstardom. Siblings Mollie (20) and Mamie (16) McGinn, – alongside their lifelong friend Orlaith Forsythe (20) – formed Dea Matrona in their hometown of Belfast in 2018, armed with their formidable talent, a dream, and an ear for a great hook.