The Argentine youngster had long been linked with a move to the Giuseppe Meazza side and has now signed a contract until June 2018 with head coach Walter Mazzarri's team.
|12/1||Inter are 12/1 with Coral to win Serie A
The forward impressed at Sampdoria last term after joining the Blucerchiati from Barcelona in 2011 and he is keen to make the next step in his career at Inter.
"I’m happy to have arrived here. I hope to do my best for the team and the fans. I can’t wait to start the new season," Icardi said upon his arrival at the Nerazzurri.
Icardi joins compatriots Esteban Cambiasso, Walter Samuel, Javier Zanetti, Diego Milito and Rodrigo Palacio at his new club.