An image has been released of a Roma couple with the young girl, known as Maria, who they are accused of abducting as a baby.
The couple have today been appearing in court in Larissa, Greece.
Kerry Needham, mother of Ben who has been missing since 1992, has been speaking to Calendar's Claire Ashforth about the renewed hope of finding her son after the discovery of a girl in Greece.
A couple are presenting their case in court after a young girl was discovered at a Roma camp in Greece.
A dental examination has revealed the girl, known as "Maria", is aged between five and six years old.
ITV News reporter Lewis Vaughan Jones is outside the court in Larissa, where the couple are giving evidence:
The Greek charity taking care of the girl known as Maria said the result of a dental examination shows she is between five and six years old.
The leader of the local Roma community where four-year-old blonde girl, known as Maria, was found said children are have not been bought and sold in his town.
Community president Babis Dimitriou said: "No such thing has happened in our community.
"Is the woman who found the child at fault? She should have gone to the police [and say] 'the Bulgarian abandoned the child with me and got up and left.'"
Media are not allowed inside the court where the "parents" of Maria are presenting their case to prosecutors.
I'm outside the courthouse in Greece where the "parents" of little Maria are putting their case forward.
The mother of Ben Needham, speaking exclusively to Calendar, said she wants the Greek authorities to investigate the case of Maria, a four-year-old girl recovered from a Roma camp, to see if there are any connections to the disappearance of her son 22 years ago.
Ms Needham and her family believe Ben was abducted, possibly by people from the Roma community, from Kos in July 1991.
Ben's mother was told the Greek authorities never believed a blonde European child could be harboured in a Roma camp without anyone knowing, but the discovery of Maria disproves that theory, according to Ms Needham.
She spoke to us via Skype while on holiday abroad.
More than 5,000 calls have been made to a Greek charity after an international appeal was made in a bid to discover the identity of a four-year-old girl, known as Maria, who was recovered from a Roma camp in Greece.
The welfare charity Smile of the Child, who is caring for the little girl at one of its homes, has received thousands of calls since Friday.
South Yorkshire Police say there is no "direct correlation" between Ben Needham's disappearance and a girl found in Greece.
The girl is suspected to have been abducted after the couple claiming to be her parents turned out not to be related after a DNA test.
She was discovered in a Roma gypsy camp, where there had been a reported sighting of Ben who disappeared from a Greek island 21 years ago.
"South Yorkshire Police is aware of the case currently being investigated by Greek police after a young girl was found at a Roma settlement in the country.
"At this stage there appears to be no direct correlation between this and the disappearance of Ben Needham, who was 21 months old when he went missing on the island of Kos in 1991.
"The case of Ben Needham continues to be investigated by the Greek authorities and South Yorkshire Police continues to support his family.
"No investigation is currently being carried out by the force in light of this recent case and officers from South Yorkshire Police will only become involved should authorities in Greece require our assistance."
Watch: exclusive interview with Kerry Needham urging Greek police to look for Maria case links