Colchester United will host Athletic Bilbao in their first match at the new Community Stadium.
The Spanish giants will visit the U's new ground on 4 August.
They will feature in the first ever match to be played at the 10,000 seater stadium which replaces Colchester's Layer Road ground.
Colchester spokesman Matt Hudson told BBC Essex: "We've been looking for a big name and with Bilbao being in England to play Charlton it's ideal."
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