Chris Maduewesi
Member
Welbeck joined Arsenal in what is believed to be a four-year deal with an option for a fifth,worth £16million.
With Manchester United set to announce the signing of Radamel Falcao from Monaco,Welbeck follows in the steps of Javier Hernandez in leaving the club on deadline day transfer.
"Danny Welbeck has joined Arsenal for an undisclosed fee on a long-term deal," Arsenal confirmed on their website.
"The transfer is subject to the completion of regulatory formalities. Everyone at Arsenal welcomes Danny to the club and looks forward to his contribution in an Arsenal shirt this season."
The England international is currently with the Three Lions and will team up with his new Arsenal team-mates to prepare for their next game against Manchester City next weekend.
"Danny Welbeck has signed for Arsenal after 29 goals in 142 appearances for #mufc. Good luck for the future, Danny." Manchester United wrote on their Twitter page.
Photo Credit: @ManUtd