Jethro Hanson and Mason Saunders-Henry were on target as Millwall's Under 23s won 2-0 at Colchester United in the Professional Development League.
Hanson opened the scoring just after the half-hour mark, before Saunders-Henry sealed all three points in the 59th minute.
Next up for Kevin Nugent's young Lions is the visit of local rivals Crystal Palace on 22nd January.
Millwall: Sandford, Brown, Tiensia, Donovan, Debrah, Parker, Hanson, Wicks, White, Harvey, Saunders-Henry (Duncan 87'). Subs not used: Toppaloj, Fanshawe, Mitchell, Alexander.