Apple CEO Tim Cook announces the new iPhone X during an Apple special event at the Steve Jobs Theatre on the Apple Park campus on September 12, 2017 in Cupertino, California. ? AFP

CUPERTINO, United States: Apple unveiled three new iPhone models on Monday, including a top-of-line handset described as "the biggest leap forward" since the original iPhone 10 years ago.

Apple chief executive Tim Cook announced the premium iPhone X -- pronounced 10 -- as well as a new iPhone 8 and 8 Plus.

Cook, speaking at the first event at the new campus theater named for the late Apple co-founder Steve Jobs, said the latest flagship handset is a milestone for the company a decade after the first iPhone release.

"Ten years later it is only fitting that we are here in this place, on this day to reveal a product that will set the path for technology for the next decade," Cook said, calling the iPhone X "the biggest leap forward since the original iPhone."

Apple senior vice president of worldwide marketing Phil Schiller speaks during an Apple special event at the Steve Jobs Theatre on the Apple Park campus on September 12. ? AFP

The iPhone X has an edge-to-edge screen and uses facial recognition to unlock the device, and improved "super retina" display with improved graphics and resolution.

Apple senior vice president, Phil Schiller, said the glass-body iPhone 8 and 8 Plus handsets were the first smartphones "really created for augmented reality," with improved power and graphics over their predecessors.

Apple also unveiled an updated smartwatch and an upgraded streaming video system for 4K high-definition television.