Manchester United have confirmed the signing of Alexander Buttner from Vitesse Arnhem.
The Dutch defender completed his medical on Tuesday and agreed a five-year contract at Old Trafford until 2017.
His new manager Sir Alex Ferguson promptly declared that the 23-year-old is one of the best in the business.
Ferguson told the club's official website: "Alexander is one of the best young left-backs in Europe and we're delighted to sign him.
"He's someone we've been watching for a while now. He gives us some really exciting options in that position."
And Buttner can hardly hide his own excitement at signing for the Red Devils.
He added: "Joining Manchester United is one of the best days of my life.
"It's a team I have admired for many years now and I can't wait to join my team-mates and play my part in helping the club be successful."