Joint race director David Bedford said: “We are delighted to have Prince Harry with us to present awards to our runners this year.
“Prince Harry is a great supporter of the event and it is especially fitting to have a royal presence during the Queen’s Diamond Jubilee year.”
A total of 36,000 runners have registered for this year’s marathon.
A St James’s Palace spokesman said Harry - who has accepted a three-year patronage of the London Marathon Charitable Trust - will meet volunteers involved in the administration of the marathon and members of St John Ambulance on Sunday.
The prince, who became patron of the London Marathon Charitable Trust this year, will hand trophies to the first three finishers in the men’s and women’s races, and those in the men’s and women’s wheelchair events.
He will also present prizes to winners in the Virgin Money Giving Mini London Marathon.
The event involves young runners aged 11 to 17 from across the country in races over the final three miles of the course.
Chelsea Old Town Hall will be the venue for the renowned Desire Fair from 6-8 March 2015. This stunning mixed media jewellery and silversmithing event where visitors can purchase direct from contemporary designer makers selected from the best in the UK is an event not to be missed.