The Englishman has signed a four-year deal with the Mackems, ending a spell at Manchester City in which he struggled to truly break through into the first teamSunderland have completed the signing of winger Adam Johnson from Manchester City for an undisclosed fee.
The 25-year-old has signed a four-year deal with the Mackems, and becomes the club's second signing on Friday following the acquisition of Steven Fletcher from Wolves.
Manager Martin O'Neill told the club's official website: “Adding quality players to the squad has been our main aim this summer and Adam certainly fits that bill.
“He has terrific ability, great delivery and I'm sure he is a player who will excite our fans. I couldn't be more delighted to have him at the football club.”
Johnson joined City in 2010 after several eye-catching performances for Middlesbrough following his graduation from the club's youth setup.
However, he failed to maintain a first-team spot throughout his time at the Etihad Stadium, regularly featuring as a substitute during Roberto Mancini's tenure.
The Middlesbrough-born wideman has 11 senior England caps but did not make Roy Hodgson's squad for Euro 2012 this summer.