Missing schoolgirl Megan Stammers and her teacher Jeremy Forrest have been found in France, Sussex Police have said.
The 15-year-old has been taken into protection and Forrest, 30, has been arrested, the force said.
They were found at around 12.15pm today UK time. Police would not reveal the exact location. The pair were both "safe and well", the force said.
Forrest has been arrested on suspicion of child abduction. They were found as a result of information that came after the case received media coverage in France, police said.
Forrest and Megan's families have been informed and arrangements will be made for their return to the UK, the force added. French media reported that the pair were found in Bordeaux.
Martin Stammers said he was "thrilled to bits, just over the moon" at news of his stepdaughter's return. He said: "The relief, the outpouring of love from everyone has just been amazing. We're so happy."
He said he felt "pure elation, pure relief that she is just safe and well" and went on: "As time goes on you despair even more, but knowing Megan, knowing the girl she is, I always had that belief that she was strong enough within herself to remain safe and well."
He said there was no indication of when she would return to the UK, and thanked police and campaign supporters on Twitter and Facebook who helped maintain publicity of the case.
Mr Stammers added: "I'm just happy. I just know in my heart that she's safe and well and she will be back with us very soon. We have our daughter back, it's just such joy."
The alarm was raised when Megan, from Eastbourne, East Sussex, failed to go to school a week ago and it was discovered that she had travelled with Forrest on a ferry from Dover to Calais the previous evening. They had tickets to return to the UK on Sunday, but did not use them.