Daniel Cousin grabbed the winner for Hull to end Arsenal's unbeaten run at the Emirates Stadium and mark Arsene Wenger's 12th anniversary at the club with a stunning 2-1 defeat.
Phil Brown's men join West Ham as the only clubs to have beaten Arsenal at their new ground - they had gone 17 months without a home loss - with victory also denying Wenger a return to the top of the Barclays Premier League.
The hosts had taken the lead through Paul McShane's own goal but Geovanni struck a spectacular equaliser before Cousin headed home in the 66th minute.
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