Matty Acton, a Brisbane breakfast radio host and content creator, became a grandfather at 37 when his stepson Ethan had a daughter. Now 38, Matty navigates the unique challenge of raising two young children aged 8 and 11 while simultaneously being a grandfather, creating a family dynamic where his youngest kids refer to themselves as 'yanti' and 'yunkle' to their niece. He and his wife Esther document their experiences on the Underage Grandparents podcast, discovering many others worldwide who became grandparents in their twenties and thirties.