It appears as all of those rumors surrounding an official iPhone launch event were correct, as an invitation has surfaced that officially declares October 4th the date for the big media event.

The invitation was first received and reported by The Loop’s Jim Dalrymple, a longtime follower of Apple who was formerly with MacCentral and Macworld.

Without further ado, here is the invite:

As you can see, it’s quite simple but still pretty clever. Consisting of four well-known iOS icons, the calendar says Tuesday the 4th, the clock says 10 (a.m. P.T, says The Loop). The map shows that the event will be held at the expected location, Apple’s campus in Cupertino. And it simply states “Let’s talk iPhone.” Of course, there is no indication of a “5″ in that statement – but it it widely assumed that it will be the headlining new product at the event. There might also be a cheaper iPhone 4 model announced, if rumors prove correct.

People are still speculating as to the design and new features of the device. A big hint came yesterday when details about an iOS feature called “Assistant” surfaced. It is described as a game-changing voice control software that allows users to run almost every aspect of the phone via voice commands.

The October 4th event will be hosted by new Apple CEO Tim Cook.

We will give you updates if any more information on the event surfaces.