France international striker Olivier Giroud has agreed a contract with Arsenal, the Premier League club confirmed on Tuesday.
The 25-year-old, who arrives from French champions Montpellier, completed a medical before agreeing terms on Monday evening.
His 21 goals in 36 league games made him the French league's joint top goalscorer last season.
Giroud said the style of football Arsenal play under French manager Arsene Wenger had been a major factor in his decision.
"I was attracted by the philosophy of football and Arsene Wenger's 'touch' at this club," he said.
"I have always admired Arsenal with its great history and reputation, and I now hope to achieve great things here. I'm very proud to be a Gunner and I will give my best for all the Arsenal fans."
Wenger said: "We are delighted to have secured the signing of Olivier Giroud. He has a very good physical presence and is exceptional in the air, with a great work ethic."
(FILES) - A picture taken on June 5, 2012, at the Le Mans Stadium, shows French forward Olivier Giroud reacting during the friendly football match France vs Estonia. Giroud has agreed a contract with Arsenal, the Premier League club confirmed on June 26, 2012. The 25-year-old, who arrives from French champions Montpellier, completed a medical before agreeing terms on June 25, 2012 evening. AFP PHOTO / FRANCK FIFE