The Royals are currently eight points clear of seventh position as they look to claim a play-off place.
Meanwhile, Millwall are in 14th place, and are on a nice unbeaten run of five games, after poor form earlier in the season has left them ten points off a play-off place.
Reading are most likely going to remain unchanged from their 1-3 loss to Brentford midweek.
They are set to be without Yakou Meite and John Swift who are set to be out for the next couple of weeks. George Puscas, Felipe Araruna and Liam Moore may be back in the next two weeks are not going to feature here.
Gary Rowett could make some changes after last weekend's 1-4 victory over Sheffield Wednesday, with Jed Wallace and Ben Thompson pushing for a start. Connor Mahoney and Murray Wallace are both unavailable.
Rafael; Yiadom, Morrison, McIntyre, Richards, Laurent, Rinomhota, Olise, Semedo, Ejaria, Joao.
Bialkowski; Cooper, Hutchinson, Evans, Romeo, Leonard, Thompson, Kieftenbeld, Malone, Wallace, Zohore.
Ones to watch
After a number of injuries and inconsistency hindering his career, this season he has managed to get rid of both in what has been a standout year. With his goal midweek being his 19th in all competitions so far, he is one of the best goalscorers in the division.
The former Reading academy graduate has been a mainstay for Millwall since his arrival in 2017, with his sheer size and strength being key components to his game that many in the Championship fail to deal with.
The last time these two sides met was in late November when they fought out a 1-1 draw, with Lucas Joao equalising after a Jed Wallace free-kick.
How to watch
This match will kick-off at 15:00 pm on Saturday, February 13, and is available to watch by purchasing an iFollow pass or £10.