The youngest participant in the 2025 London Marathon will celebrate her 18th birthday on race day.
Lucy, from Hull, will run her first marathon on Sunday alongside her dad to raise money for Macmillan Cancer Charity in memory of her mother, Clare, who died from cancer when the teenager was nine years old.
The 17-year-old said: "How many people can say they spent their 18th birthday running the London Marathon? It's going to feel like a massive achievement for me once it's all done."
Event organisers said it had seen an increase in the number of young adults taking part in the race in recent years.