Manchester United said Louis van Gaal will become the club's new manager on a three-year contract after this summer's World Cup.
Manchester United tweeted:
Rio Ferdinand has spoken of his sadness at not being able to say goodbye properly before his departure from Manchester United.
The veteran defender issued a statement saying: "Circumstances didn't allow for me to say goodbye the way I would have liked but I'd like to take this opportunity to thank my team-mates, staff, the club and the fans for an unbelievable 12 years that I'll never forget.
Veteran defender Rio Ferdinand will leave Manchester United this summer after 12 years at the club.
Ferdinand's contract had come to an end and the club have opted not to renew the 35-year-old's deal.
He said in a statement: "I have thought long and hard over the last few months about my future and, after 12 fantastic years playing for what I regard as the best club in the world, I have decided the time is right for me to move on."
The centre-back joined the Old Trafford outfit for £30m from Leeds United in the summer of 2002, going on to make over 300 appearances.
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Manchester United's caretaker manager Ryan Giggs was in the dugout for United's game against Norwich City, but how did he do?Read the full story ›
Caretaker manager of Manchester United Ryan Giggs spoke to Sky Sports after his team convincingly beat Norwich City 4-0:
Giggs said: "I was really pleased with the performance and the response of the players. I didn't sleep last night with having to leave the likes of Mata out of the starting eleven and it was really, really tough. I am one of their team-mates so to leave them out was really tough".
"It was really difficult to pick the team but I wanted experienced players because I knew it would be an emotionally charged game and they didn't let me down. I trust them all. All of us have let ourselves down this year and we haven't played to the level we are capable of."
Norwich City's new manager Neil Adams said the team was "very disappointed" after its 4-0 defeat to Manchester United
The match at Old Trafford was Ryan Gigg's first since he became interim manager of United following David Moyes' exit from the club.
Speaking to Sky Sports after the 4-0 over Norwich, Wayne Rooney said: "We have had a tough week and we understand there was a lot of negativity towards us, we are hurt by that and want to put it right - today we have shown that, we have to show that we are a top team.
"He is built to be a manager - Giggsy has all the credentials to be the next boss."