Celebrities including Dame Kelly Holmes, Natalie Dormer and Chris Evans will join runners at the Virgin Money London Marathon this year.
Double Olympic champion Dame Kelly leads a field of stars from film, TV, radio and sport who will be limbering up at the start line on April 24.
She won won gold in the 800m and 1500m at the 2004 Olympic Games but will be making her London Marathon debut and hoping to raise for £250,000 for The Dame Kelly Holmes Trust, Myeloma UK, MIND and two charities in her home county of Kent, The Pickering Cancer Centre and Hospice in the Weald.
Game of Thrones and Hunger Games star Dormer will be running for the NSPCC and hoping to beat her time of 3.50.57 from 2014.
New Top Gear host Evans will be running for a second time, after clocking 4.53.15 last year. He and his wife Natasha are running in a team to raise money for Children in Need.
A host of reality TV stars will also be running for charity including Baasit Siddiqui who is best known for sitting on his sofa alongside his father and brother and making audiences chuckle on Gogglebox.
He and Gary Poulton, a semi-finalist in the 2015 series of The Apprentice, are raising money for Great Ormond Street Hospital Charity.
Poulton will also be supporting Liam's Smiles, the charity set up by ex-Birmingham City goalkeeper Colin Doyle and his wife Becky for their son Liam, who was diagnosed with meningitis as a baby.
Former Made In Chelsea star Ashley James is running to raise money for Marie Curie.
Ex-footballers Danny Mills and Clarke Carlisle are running in aid of the Bobby Moore Fund, which supports Cancer Research UK's work to beat bowel cancer, in the year that marks the 50th anniversary of England's World Cup win, captained by Moore.
London Marathon veteran and long-standing Emmerdale star Chris Chittell will head a team of runners from the world of television for the charity Bloodwise and will be joined by Gwilym Lee from Midsomer Murders and Richard Harrington, of Welsh drama Hinterland.
BBC News presenter Sophie Raworth will be running for the fifth time and Match Of The Day's Jonathan Pearce will run his seventh London Marathon for The Lily Foundation, the charity established in memory of his niece Lily.
Good Morning Britain presenter Sean Fletcher returns for the second time to raise money for Beating Bowel Cancer in memory of his late mother.