The Turkey international, who was accused of racial abuse by Trabzonspor's Didier Zokora in April, has penned a two-year contract with the Europa League winners
The Turkey international has signed a two-year contract with the Rojiblancos and news of his imminent arrival at the Vicente Calderon was enthusiastically greeted by compatriot Arda Turan.
"He has everything to succeed at Atletico," the 25-year-old winger told the club's official website.
"He has shown that he has the personality to control big teams and his experience can help a lot in key games.
"For me, he's like my brother and I have learned a lot from him."
Atletico sporting director Jose Luis Caminero also believes that Emre will prove a valuable addition to Diego Simeone's squad.
"His experience should bring further strength to our team, which is one of the youngest in the league," the former Spain international pointed out.
Emre, who has been capped 80 times by his country, was reportedly keen to leave Turkey after finding himself at the centre of a racism controversy last month following a clash with Trabzonspor's Didier Zokora.