The Netherlands boss will take charge at Old Trafford following his World Cup commitments and admits he has "big ambitions" to take the club forward
The Netherlands boss was announced as David Moyes's permanent successor on Monday and will begin his role following the conclusion of the World Cup in Brazil.
Van Gaal will be assisted by United legend Ryan Giggs, who took temporary charge of the Red Devils back in April and steered the club to two wins from his four games, and the Dutchman is confident that the new managerial set-up can help make history at Old Trafford.
He told the club's official website: "It was always a wish for me to work in the Premier League. To work as a manager for Manchester United, the biggest club in the world, makes me very proud.
"I have managed in games at Old Trafford before and know what an incredible arena Old Trafford is and how passionate and knowledgeable the fans are.
"This club has big ambitions; I too have big ambitions. Together I'm sure we will make history."