Nell Marmalade Baxendale-Williams, known as Nell Williams, is an English actress. In 2015, she portrayed a teen version of Cersei Lannister in the opening episode of Season 5 of the HBO series Game of Thrones. She has also appeared in the sitcom The Revolting World of Stanley Brown, the television film Loving Miss Hatto, and in an episode of the drama series Grantchester. Williams appeared as Vivian Daniels in the 2016 film London Town, which premiered at the Los Angeles Film Festival.