Millwall will take on Concord Rangers in their opening pre-season friendly of the 2019/20 campaign on Saturday July 6th.
The Lions' Sky Bet Championship fixtures are announced on June 20th before a return to training follows, where Neil Harris will hope to be joined by a number of new arrivals - Alex Pearce remains the summer's only addition thus far.
The match against Rangers will take place at Thames Road, with kick off at 1pm.
Following that match, Millwall will travel to Portugal for a six day warm weather training camp where they will face both Portuguese and English opposition, before returning to the UK on July 18th.
Next up is a trip to Priestfield on Sunday July 21st (1pm kick off) to take on Steve Evans' Gillingham.
The former Rotherham & Leeds boss isn't the most popular figure amongst Lions fans after his comments following relegation in 2015, where his Millers side escaped the drop.
A return to Roots Hall for Neil Harris, Adam Barrett and Ryan Leonard then looms on Wednesday July 24th (7:30pm kick off), as Millwall take on League One Southend United.
Harris' side will play one more friendly after that, at The Den on the weekend before the Championship season starts - with the opposition yet to be confirmed.
Ticket details will be announced in due course.
Nearest train station: Benfleet - followed by a taxi or bus service
Nearest train station: Gillingham - followed by a ten minute walk
Nearest train station: Prittlewell - followed by a five minute walk