The former Atletico Madrid shot-stopper is seen as a direct replacement for Edwin van der Sar who retired from football at the end of last season, United have yet to announce the fee to sign the Goalkeeper.
De Gea stared for the Spanish under 21’s who captured the European Championships last week conceding only two goals during the whole tournament,
The 20-year-old passed a medical earlier this week and has spoke of his delight at signing for the Premier League champions
"I feel very proud and I can't wait to start playing here," De Gea told MUTV.
"When a club the size of Manchester United comes in for you it obviously makes you very, very happy.
"I saw their interest as an extra motivation to work even harder to show off my ability.
"It's a great privilege to be part of a club like United and I'm keen to do my best and show what I can do."
