United had three previous offers to lure Kuszczak rejected by West Bromwich before they finally agreed to led go the keeper who expressed his delight with the move to Old Trafford.

"As soon as United came for me, I wanted to join them, the chance to play for the biggest club in the world is not one you can pass," Kuszczak told the club's official website.

"I'm looking forward to the challenge the Premiership and the Champions League brings, it's a fantastic opportunity for me."

Kuszczak joined West Bromwich from Hertha Berlin in 2004, and the 24-year-old became the club's first choice keeper last season before featuring with his country in the World Cup.

"Tomasz will add good quality to the squad, he has plenty of ability and knows what challenges the Premiership presents, I'm sure he'll benefit from playing alongside Edwin Van Der Saar," Manchester United coach Alex Fergsuon said.