Sian Reese-Williams (born 18 November 1981) is a Welsh theatre and television actress and singer, best known for playing Genesis Walker in Emmerdale.
She was awarded the BBC London Theatre Award for outstanding performance in a musical in 2001 for her role in the National Youth Music Theatre's production of The Dreaming.
She graduated in Drama from the University of Hull and trained at the Royal Welsh College of Music & Drama.