Robbie Brady will make a return to Hull, joining the East Yorkshire side for a second loan spell.
Sir Alex gave the deal the green light after Hull had tracked the 20 year old with a view to strengthen their wide areas, and will sign the winger on a one month deal with a view to extend it.
Hull manager Steve Bruce will hope to get the deal sorted by mid day in order for Brady to be able to face Wolves at the KC Stadium tonight.
Brady spent last season with Hull making 41 appearances and Steve Bruce feels the winger, who can also operate as a left back, would be an ideal signing especially with his connection to Manchester United.
Making his first team debut against Newcastle in the League Cup, Brady has also been included in the Republic Of Ireland set up, scoring and creating 2 chances on his debut against Oman.