Lucy Diana Boynton was born on the 17th of January 1994 to Adrienne Pielou and Graham Boynton (who are both travel writers and editors for The Telegraph) in London, England. She has an older sister, Emma Loiuse.
Graham wrote an article mentioning his daughter in Disneyland in 2004, and Adrienne wrote an article about her daughter's role in Miss Potter in 2006. Lucy wrote her own account of Eurodisney for The Telegraph in 2004.

Her father Graham is a british-born Zimbabwean who has previously written for Vanity Fair and the Sunday Telegraph. He has also authored a book called "Last Days in Cloud Cuckooland".

Lucy previously attended Blackheath High School and now attends James Allen's Girls' School.