Millwall caretaker-boss David Tuttle praised 18-year-old Marvin Williams after he marked his full debut with a goal in the FA Cup draw with Everton.
He was on target in the 1-1 stalemate at The New Den and Tuttle said: "We are delighted with him.
"He only signed his first pro contract a few hours before the game, and we are over the moon about that.
"He could have gone out on loan earlier this season. But we have decided to give youngsters a chance here."