Charlton midfielder Therry Racon is to join Millwall on a two-year contract on July 1 when his deal with the Addicks expires.
The Guadeloupe international, 27, joined Charlton in 2007 from French club Guingamp and scored seven goals in 100 league appearances.
"As soon as my agent told me of Millwall's interest I was happy to sign here," Racon told the Lions' official website.
"Millwall are a big club and coming here will be a good challenge and opportunity for me back in the Championship.
"I know Hamer Bouazza from our time together in France and I know about the fans from having played here for Charlton."
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