Meet Ella and Olivia. Big sister. Little sister. Best Friends. Ella and Olivia are sisters. Ella is seven years old. Olivia is five-and-a-half years old. They live with their mum and dad and little brother Max. The sisters love to dance, read and bake yummy treats! Includes these four Ella and Olivia books: Cupcake Catastrophe, Best Friend Showdown, Ballet Stars and The New Girl.