Millwall's 2017/18 Sky Bet Championship campaign will continue with a home game against Harry Redknapp's Birmingham City on 21st October.
After the meeting with The Blues, The Lions will embark on two road trips to Cardiff City and Sheffield Wednesday.
A Saturday in south Wales will see two Neil's battle as Harris takes on Warnock, before the club travel to Hillsborough on Halloween night to do battle with last season's beaten Championship Play-Off Semi-Finalists.
A further international break follows on the weekend of 11/12 November, but prior to that, Millwall welcome Burton Albion to The Den for a first meeting since a televised 2-0 victory on Easter Monday 2016.
Ahead of the new season, millwallfc.co.uk takes a look at all 23 of The Lions' opponents for the forthcoming campaign, continuing with Birmingham City...
Stadium: St Andrews
Manager: Harry Redknapp
Sat Nav Post Code: B9 4RL
Nearest Train Station: Bordesley
Last Meeting: Birmingham City 0-1 Millwall - Sky Bet Championship - 10th February 2015
Millwall and Birmingham City will meet for the 43rd time on 21st October. To date, The Lions have won just 10 fixtures against The Blues.
Stadium: Cardiff City Stadium
Manager: Neil Warnock
Sat Nav Post Code: CF11 8AZ
Nearest Train Station: Ninian Park Halt
Last Meeting: Cardiff City 0-0 Millwall - Sky Bet Championship - 18th April 2015
The form is very much even in the previous 64 meetings between the two clubs - Millwall have 21 wins to their name whilst The Bluebirds have 20.
Manager: Carlos Carvalhal
Sat Nav Post Code: S6 1SW
Nearest Train Station: Sheffield
Last Meeting: Millwall 1-3 Sheffield Wednesday - Sky Bet Championship - 24th February 2015
Millwall will go in search of a first win in eight over The Owls when the two lock horns on 31st October - The Lions have 14 of 44 previous meetings.
Stadium: Pirelli Stadium
Manager: Nigel Clough
Sat Nav Post Code: DE13 0AR
Nearest Train Station: Burton
Last Meeting: Millwall 2-0 Burton Albion - Sky Bet League One - 28th March 2016
Millwall and Burton Albion will renew acquaintances for just the third time on 4th November - both sides currently have one win a-piece.