Ryan Seacrest (AP Files)

The man accused of harassing TV personality Ryan Seacrest is facing up to four years in prison after he was officially charged with stalking the star.

Chidi Uzomah was arrested outside the American Idol host's Los Angeles offices on Friday after he was found on the premises with a knife.

The suspect, a special forces reserve for the U.S. Army, has been ordered to stay away from Seacrest after the star was granted a restraining order.

Prosecutors in L.A. officially filed the felony charge against Uzomah, 25, on Monday.

It's not Seacrest's first encounter with Uzomah - the obsessed fan pleaded guilty in September to attacking the TV host's security guard during a visit to a hospital.