Wolves winger Ben Marshall is set to undergo a medical at Millwall ahead of his loan move.
The Lions have been chasing the 26-year-old for most of the transfer window and fended off competition from Championship rivals Sunderland.
Den boss Neil Harris has already signed Jason Shackell, Harry Toffolo and Tim Cahill this month.
And Marshall is expected to be the fourth and final arrival before the transfer window closes at 11pm tonight.
Speaking last night, Harris said: “Ben’s a player we like.
“I've followed him over a couple of years.
“He's a Wolves player at the moment, and we’re looking to bring in a player tomorrow, an attacking player. Watch this space.”
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