Price, 31, helped fired Rovers to promotion last season after suffering a snapped Achilles tendon in the 2007 Johnstone's Paint Trophy Final which kept him out of the Donny side for nine months.
Millwall boss Kenny Jackett has been looking to add to his striking options as The Lions look to capture the last automatic play-off spot after Vincent Pericard was ruled out for the rest of the season through injury. And he knows Price from his days as Swansea manager, where the player often operated on the right wing.
More to follow...