Miller, 24, is reportedly in talks with Leeds over a one-month loan arrangement.
Kevin Blackwell is keen to strengthen his squad and is looking at a few options but the Republic of Ireland international is not a regular at Old Trafford, making only three appearances this season, and Sir Alex Ferguson is thought to be willing to loan him out.
Miller has struggled since his controversial move from Celtic two seasons ago and he is believed to have come under fire from Roy Keane in his infamous banned interview with MUTV earlier this week.
Miller could even make his Leeds debut this weekend against Preston.