The Premier League side have signed 15-year-old Republic of Ireland defender Lee O'Connor.
O'Connor is currently the captain of Ireland's Under-16's and he was named Ireland's Under-15 Player of the Year in March.
The defender will move to United's academy in July.
In Soccer - @flanagan_adrian speaks exclusively to @ManUtd new signing and @VillaFC1953 player Lee O'Connor pic.twitter.com/Hd2Ws3lyXM
— Waterford Sport (@WaterfordSport) April 19, 2016