The Germany international sealed a club-record £40 million switch to the Emirates Stadium late on Monday evening, with the playmaker signing a £130k-a-week five-year deal in one of the biggest moves of the transfer window.
Shortly after the deal was confirmed, Wilshere Tweeted: "Signing of the summer! Easily! Fantastic player, plays the 'Arsenal way'. Welcome @MesutOzil1088 absolutely buzzing!"
Lukas Podolski also posted on the social network site after the Gunners officially confirmed the transfer of the former Werder Bremen playmaker: "Welcome Bro. London calling!;)))"
Centre-back Laurent Koscielny, meanwhile, believes that the Gunners have signed a player of "world-class" ability.
Speaking to reporters ahead of France's World Cup qualifier against Georgia, he said: "We talk about Mesut Ozil, we'll see, this is a world-class player, a technical player who can adapt to Arsenal."
What do you think? Is Ozil the signing of the transfer window? Is he the type of player that can propel Arsenal to the Premier League title? Have your say in the comments section below!