A Millwall XI will take on Greenwich Borough ahead of the club's 2017/18 Sky Bet Championship campaign.
In conjunction with the club's first team pre-season friendlies, The Lions will meet Gary Alexander's side at DGS Stadium on Friday 28th July (kick-off 7.30pm).
Ticket prices for the match have been set at £10 adults, £5 concessions/under 18s and FREE for under 11s.