Fulham can leapfrog Cardiff and move into the top two with victory before the Bluebirds face Nottingham Forest on Saturday.
The Cottagers are in equally good form, having not suffered defeat in the Championship since losing 1-0 at struggling Sunderland on December 16.
Forward Floyd Ayite is unavailable with a hamstring injury picked up earlier this month, with Liverpool loanee Sheyi Ojo is also sidelined with an unspecified knock.
PFA young player of the year award nominee Ryan Sessegnon is likely to start at left wing, with Denis Odoi and Tim Ream at the heart of the defence.
Slavisa Jokanovic has won all three Championship meetings with Millwall, winning two with Watford and one with Fulham.
There have been just two goals scored in the last three Championship meetings between these sides, with both sides scoring one apiece.
Fulham winger Ryan Sessegnon has scored more league goals in 2017-18 than any other teenager in the top four tiers of English football (14 goals).