Inter unveiled Brazilian midfielder Amantino Mancini from Roma as coach Jose Mourinho's first signing this afternoon.
The 27-year-old, whose contract with Roma had just one more season to run, penned a four-year deal after the clubs agreed a fee of €12.5m.
Having moved to Italy from Mineiro in 2002 with Serie B side Venezia, Mancini joined Roma a year later and went on to score 40 goals in 154 top-flight appearances.
"Our dream is to win Serie A and the UEFA Champions League," the new signing said. "With the squad we have, everything is possible.
"I had five fabulous years at Roma but my first impressions of Inter are also very positive. I have just met Mourinho. We have both arrived in Milan to achieve something special for Inter."
Meanwhile, 19-year-old midfielder Francesco Bolzoni has renewed his contract with the Nerazzurri until 2012.
Having joined Inter's youth system when he was eleven, Bolzoni made his first team debut in February 2007 in the Coppa Italia semi-final against Sampdoria. He did not play in Serie A last term but appeared twice in the Champions League against PSV Eindhoven.
In November 2007 he made his debut with Italy Under-21, becoming the second youngest player ever to play at that level for his country.