Thousands of runners ended up covered head to toe in bright colours as they took part in a 5 kilometre charity "colour run" in London.
The untimed race at Wembley was the first of six such events taking place around the UK this summer.
The runners are subjected to colour explosions of powder made from cornstarch throughout the course of what its organisers call the "happiest 5k on the planet."
An elite runner from Sierra Leone who disappeared after finishing the women's race at the London Marathon in 20th place remains missing.
Scotland Yard launched an appeal to find 24-year-old Mami Konneh Lahun, when she did not return to her temporary accommodation in Greenwich, where she had been staying since arriving in the UK on April 7.
Police said earlier that she had been found in Greenwich, but later reissued an appeal.
They said she was due to fly home yesterday. The runner has no known links to the UK and was not in possession of a mobile phone.
The sister of a London Marathon runner who collapsed a mile from the marathon finish line in 2012, has paid tribute to Robert Berry. Penny Squires, the sister of Claire Squires, who died from cardiac failure wrote: "Bless you Rob. A hero.
"My amazing sister Claire died running the 2012 London Marathon. My thoughts are with your family. Here's to you Rob & Claire, two of life's most amazing people. Taken too soon xxx," she said on his JustGiving page.
Almost £1,000,000 has since been raised by donations to Claire's Just Giving page.
Fellow London Marathon runners have paid their condolences to Robert Berry, who died after completing the run. His JustGiving page has already received more than £10,000 of donations.
Donations continue to pour in for Robert Berry, who died after completing the London Marathon yesterday. Tributes were paid to the 42-year-old on his JustGiving page, who has raised over £2,200 for the National Osteoporosis Society.
Police have issued a correction after it emerged an athlete from Sierra Leone is still missing.
Officers earlier said Mami Konneh Lahun had been found but it appears the runner is still missing.
The 24-year-old has not been seen since finishing this weekend's London Marathon and was due to fly home today.
Police apologised for creating the confusion.
A female athlete from Sierra Leone who had not been seen since finishing this weekend's London Marathon has been found safe and well.
Police said Mami Konneh Lahun, 24, had returned to an address in Greenwich where she had been staying since arriving in the UK last week.
Ms Lahun finished 20th in the race.
Police are looking to trace a marathon athlete who has not been seen since she finished 20th in yesterday's London race, Scotland Yard said.
Mami Konneh Lahun, 24, from Sierra Leone, had been staying at an address in Greenwich since arriving in the UK on 7 April.
She is due to fly home later today but did not return to her temporary accommodation following the race, police said.
Alex Prior, 25, was one of 36,000 runners taking part in the London Marathon today who battled 26 miles to make it to the finish line. However when he was just 200 metres from the end - he stopped to ask his girlfriend an important question.
Jess Seldon, 27, had been told Alex would pass by to give her a high five. Instead, Alex picked up a ring from his best friend waiting nearby before making his way over to her.
"She was completely surprised, I don't think she knew what I was doing," Alex said.
"I tried to get down on one knee, to be traditional, but it was obviously pretty difficult.
"It was fantastic, almost surreal - so much so that I had to text her at the end and ask if she meant to say 'yes'."