The experienced defender had spent the last three months on loan with fellow npower Championship side Ipswich Town, but Appleton had no hesitation in ensuring that Orr would be back with Rovers for the end of season run-in once his loan had ended.
"He's got a huge experience of this league and he's a presence," said the Rovers boss.
"He can defend the back stick well, he's a great character in the dressing room and in and around the building.
"He's a player that a lot of the lads have a lot of time for so it was important to get that type of character back into the football club."
See Orr face one of his former clubs later today when Rovers take on Bristol City at Ewood Park, kick-off 3.00pm.
Tickets are on sale priced from £15 for Adults, from £10 Seniors and from £5 for Under-16s.