Behrami had been linked with several other sides from all over Europe before signing for the Hammers this summer. The 23-year old can play on the right-side of midfield and defence and the signing could see Lucas Neill leave the club within the next few weeks.
The Lazio regular has signed a five-year contract at Upton Park after completing a medical at the club. Behrami could prove to be a quality signing for the London club and one which many Hammers hope leads to a massive influx of signings at the club.