Police launched an appeal to help find the 24-year-old.
Police have released a statement confirming Mami Konneh Lahun has now been found safe and well, having returned to her temporary address in Greenwich.
"We thank the media for their assistance," a spokesperson said.
Earlier, the Metropolitan Police launched an appeal after Konneh Lahun, from Sierra Leone, went missing following yesterday’s London Marathon.
The 24-year-old had not been seen since finishing the 26.2-mile race in 20th place on Sunday.
(Photo: Metropolitan Police)
She is due to fly home later today but did not return to her temporary accommodation following the marathon.
The police said the 24-year-old has no known links to the UK and is not in possession of a mobile phone.
Around 36,000 people took part in Sunday's London Marathon.
(Photo: John Walton/PA)
