The former Everton striker has become United's second signing of the summer after Swedish centre-back Victor Lindelof, penning a five-year contract at Old Trafford for a fee that could rise to £90m.
Wayne Rooney has gone the other way and Zlatan Ibrahimovic has also been released, so how will United line up with their new frontman?
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Remember, for news of any more new arrivals at Old Trafford before the deadline on August 31, you can follow the latest updates in the Sky Sports transfer blog.