This is what we found on Wikipedia regarding the Carrie Hope Fletcher:

Carrie Hope Fletcher (born 22 October 1992) is an English West End theatre actress and singer. Her performances include the roles of Éponine and Fantine in Les Misérables, starring as Veronica Sawyer in the original West End production of Heathers: The Musical, and originating the role of Cinderella in Andrew Lloyd Webber's Cinderella. Outside of her theatre work, Carrie has a large social media following with over half a million subscribers on YouTube. As well as this, she has written several bestselling novels for children and adults.

In 2015, Fletcher published a book called: All I Know Now: Wonderings and Reflections on Growing Up Gracefully, which was a Number 1 bestseller in the UK. Since then, she has published multiple novels and two children's books.