"We still have a lot to cover," the invitation reads.
Apple released its iPhone 5S and iPhone 5C last month and is widely expected to show off its updated iPad and iPad mini at the event on Tuesday.
(Read more: Nobody seems to want Apple's iPhone 5c )
The full-size iPad is expected to get some major design updates. It will likely be much thinner, with a much thinner casing. The iPad mini is also widely expected to get an updated screen, perhaps a retina display. There will also likely be an update on the company's line of Macs.
(Read more: Apple is not immune to PC bloodbath)
—By CNBC's Cadie Thompson. Follow her on Twitter @CadieThompson.