Millwall defender Jack Smith has been rewarded for his fine form this season with a two-year contract.
The 26-year-old arrived at The Den in the summer on a short-term deal after being released by Swindon.
And he has been a consistent performer at the heart of a Lions back four which has been without regular defenders Zak Whitbread, Paul Robinson and Tony Craig for large chunks of the campaign.
"I've enjoyed my time here already tremendously," said Smith.
"Now I am looking forward to carrying on and hopefully playing a part in helping us win promotion this season."
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