The 23-year-old signed a five-year deal with the north London club on transfer deadline day after the forward was deemed surplus to requirements at Old Trafford.
I play with my heart on my sleeve and I’m always going to give my best
Welbeck could make his Arsenal debut when they host Manchester City at Emirates Stadium on 13 September.
And the England international vowed to give his all for his new club.
“I just want them [the fans] to know that I will give 100 per cent in every single game,” Welbeck told Arsenal Player.
“I play with my heart on my sleeve and I’m always going to give my best. I’ll try to give them so many happy days in the coming future.”
Welbeck also revealed that Arsenal legend Thierry Henry was one of his idols as a youngster.
“I loved watching Thierry Henry since I was a little kid,” he added.
“My two idols are Ryan Giggs and Thierry Henry so to come to the club where he was and had so much success at is something you can look up to and try to stamp your own print on the club.”
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