Wayne Rooney has played 559 times for the Red devils, scoring 253 goals.
He had won five premier league titles and each of the champions league, Europa league and the FA cup once after joining from the Toffees for £27m in 2004.
Rooney had expressed how he feels, saying he was 'ecstatic' and his "first game back will be an emotional day".
"It's a great feeling to come back and i cannot wait to meet the lads, get on the training pitch and then get on the pitch to play", he added.
Wayne Rooney return comes as United look set to sign Everton striker, Romelu Lukaku with a £75m deal for the Belgium international agreed between the two clubs.
Rooney, 31, also said:
"I'm not just coming because is the team i support, the team i grew up playing for - i'm coming back because i feel the club can move forward and be successful".