The Rossoneri were desperate to add some fresh blood to their attack following their disappointing performances in the first half of the season and CEO Adriano Galliani already revealed on Wednesday that Destro was considering moving to San Siro.
The 23-year-old has now decided to join Filippo Inzaghi's side, resulting in a return to Milan for a player who started his career in the Inter youth academy and also wore the jerseys of Genoa and Siena before joining Roma in July 2012.
The striker had since scored 24 goals in 57 Serie A appearances for the Stadio Olimpico side, but he was mainly warming the bench this term and has therefore been allowed to move on.
Destro will have to battle it out with attackers such as Jeremy Menez and Giampaolo Pazzini for the No.9 position at Milan.
