Robin van Persie has completed his move to Manchester United.
United confirmed they had agreed a fee with Arsenal on Wednesday evening, and after a medical yesterday the final elements of the transfer have been wrapped up.
The deal has been done in time for Van Persie to go straight into Sir Alex Ferguson's squad for Monday's trip to Everton.
United announced in a statement: "Robin van Persie has completed his medical, agreed personal terms and signed for Manchester United on a four-year contract until June 2016."
Manager Ferguson said: "Robin is a world-class striker with a proven record in England and in European football.
"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."
Van Persie said it was an "honour" to sign for United.
He said: "I am looking forward to following in the footsteps of so many great strikers, bringing my experience and playing my part to help the team compete for the biggest trophies in the game. I can't wait to get started."