Dutch international striker Robin Van Persie completed his move from Arsenal to Manchester United on Friday after signing a four-year deal.
Van Persie, who scored 37 goals for Arsenal last season, is set to make his debut in United's Premier League opener against Everton on Monday.
"Robin is a world-class striker with a proven record in England and in European football," United manager Alex Ferguson told the club's website.
"His talents need no introduction to our fans - he has scored a number of goals against us in some classic battles with his former club. His movement, finishing and all-round ability are outstanding."