Lions youngster Michael Bostwick has joined Conference side Rushden & Diamonds on a free transfer after the player was told that he no longer had a future at The Den.
Bostwick, who failed to make an appearance for Millwall at a senior level, has signed an 18-month deal.
He is the latest youngster to be released as manager Willie Donachie attempts to free up funds for some much-needed squad strengthening.