Sian Mary Williams, (    ; an haife ta 28 Nuwamba 1964) yar jaridar Welsh ce kuma mai gabatar da al'amuran halin yanzu, wacce aka fi sani da aikinta da BBC . Daga 2001 har zuwa 2012, Williams a kullun tana gabatar da labaran safe na BBC Breakfast da kuma dukkanin manyan labarai a BBC One . Ta gabatar da shirye-shiryen tattauna shirin guda biyu na BBC One Sunday Morning Live daga 2014 har zuwa 2015. Tun daga watan Janairun 2016, ta kasance mai gabatar da Labari na 5 a 5 . An haife Williams a Paddington, London, ga iyayen Welsh kuma an haife shi ne a Eastbourne, East Sussex . Mahaifiyarta, Katherine Rees, ta fito ne daga Llanelli kuma ta ƙaura zuwa London don zama ma'aikaciyar jinya. Mahaifin Williams ya fito ne daga Swansea, kuma danginsa manoma ne a Glamorgan . Ya kasance ɗan jarida, yana aiki da farko a buga kuma daga baya a rediyo. Ta sami digiri na biyu a cikin Ingilishi da Tarihi daga Oxford Polytechnic (yanzu Jami'ar Oxford Brookes ), tayi karatun rubuce-rubuce mai mahimmanci a Jami'ar tsibirin Rhode, kuma ta sami digiri tare da MSc a Psychology daga Jami'ar Westminster .