Full-time score from the Priestfield Stadium
Steve Morison hit a brace and Andy Keogh scored the other as Millwall eased to a comfortable 3-1 win at Gillingham.
Steve Lomas' side roared into a 3-0 lead by half-time and although former Lion Bayo Akinfenwa pulled a goal back for Gillingham the result was never in doubt.
Keogh was handed his first start of pre-season in a new-look strike partnership with Morison and the duo enjoyed a fruitful afternoon against League One newcomers Gillingham.
There was an early scare for The Lions when a misunderstanding between Danny Shittu and keeper David Forde saw the ball bounce off Cody McDonald but bobble wide of the post.
However on seven minutes Morison opened the scoring with his first goal after returning to the club; seconds after Jimmy Abdou appeared to be brought down in the penalty area the ball fell invitingly and the Welsh international lashed home past keeper Stuart Nelson.
It was nearly 2-0 on the quarter-hour mark when Scott Malone's inviting delivery was headed narrowly wide by Morison, but the striker didn't have to wait long for his - and Millwall's - second of the afternoon. This time Liam Feeney was the provider, cutting in from the right and slipping the ball through to Morison, who fired home from a narrow angle.
Morison was close to grabbing a hat-trick on 24 minutes, volleying wide after Keogh's initial header had been cleared into his path.
The front two combined again and there was no mistaking the quality of the goal as Keogh's glancing backward header from Morison's pinpoint delivery left Nelson grasping at thin air.
Millwall introduced Alan Dunne and Jermaine Easter for Josh Wright and Keogh at the break and they continued to create further chances.
James Henry's shot was parried for a corner in the opening seconds of the second-half and then Easter headed a foot over the bar from another teasing Feeney delivery.
Gillingham had little to worry David Forde in the visiting goal with Chris Whelpdale's shot into the side netting about as close as the hosts came.
Lions boss Lomas made six changes, including new signing Richard Chaplow, but it was fellow sub Dany Guessan denied twice in quick succession firstly by a sprawling save from keeper Nelson and then by a fantastic block.
Easter hit the woodwork with a thunderous shot that crashed against the bar as Millwall kept the pressure on.
Gillingham manager Martin Allen switched things too, bringing on six players including trialist Bondz N'Gala.
The home side reduced the arrears 13 minutes from time when Akinfenwa headed home at the far post and was thwarted by a smart stop by Forde shortly after.
The very final action of the afternoon saw Gillingham sub N'Gala send Chaplow crashing to the ground with a reckless challenge just as referee Mike Bull brought proceedings to a close.
Gillingham: Nelson, Fish, Martin, Linganzi, Legge, Whelpdale, Kedwell, cDonald, Gregory, Dack, Barrett. Subs used: Davies, Akinfenwa, Muggleton, N'Gala, Hessenthaler, Haysman. Subs not used: Allen, German, Gowans.
Millwall: Forde, Smith (Chaplow, 63mins), Malone (Shorey, 63mins), Abdou, Shittu (Osborne, 63mins), Beevers (Robinson, 63mins), Feeney (McManus, 85mins), Wright (Easter, 46mins), Keogh (Dunne, 46mins), Morison (N'Guessan, 63mins), Henry (Woolford, 63mins). Subs not used: Bywater.