Defender Mahlon Romeo and midfielder Billy Mitchell have both signed new contracts with Millwall.
Winger Jed Wallace claims the race for the play-offs is wide open as Millwall try to sneak in during the final few months of the Championship campaign.
Millwall manager Gary Rowett admits he is delighted after the club secured three pieces of business ahead of the close of the January transfer window.
Chris Wilder has vowed to put out a "strong side" for Sheffield United's FA Cup fourth-round trip to face Championship side Millwall at The Den on Saturday.
After another round of midweek Premier League fixtures, it is back to the FA Cup this weekend as the remaining teams compete for a place in the fifth round.