Georgia is a British children's writer, illustrator, actress and film producer. Byng worked as an actress from 1989 to 1990, appearing in the television series Screen Two, Dealers, and Capstick's Law. While pursuing her acting career, Byng began writing comic strips, and illustrating. After her initial success in this field, she gave up acting to write full-time.
Her first published book was a comic strip story, The Sock Monsters. Byng's best-known work is Molly Moon's Incredible Book of Hypnotism, a book about a girl who finds a book about hypnotism and learns how to hypnotise people. In later books, Molly learns to use other powers such as stopping time, travelling through time, reading minds, and morphing into other forms. The sixth book in the Molly Moon series was released in 2012. Byng produced and co-wrote the screenplay for the 2015 Molly Moon and the Incredible Book of Hypnotism movie.