Boeing announced that official debut of its long-awaited Boeing 777X model will take place on 13 March 2019. The record-breaking machine is expected to become the largest and most efficient two-engine jetliner worldwide.

Our very first #777X flight test airplane will officially debut to the world on March 13th! Stay tuned to learn how you can watch it live. Check out the journey so far here: https://t.co/7twGuVZU1i pic.twitter.com/MyUnA1Thcd

— Boeing Airplanes (@BoeingAirplanes) March 4, 2019

Powered by the biggest engine in the world, GE9X, Boeing 777X will come in two variants: Boeing 777-8 and 777-9. The twin-aisle configuration of the -8 model will allow to carry 350-375 passengers, while the larger version of 777X jetliner, the -9 model, will be able to fly 400-425 passengers.

As for now, 8 major airlines have placed order for Boeing 777X planes: All Nippon Airways, British Airways, Cathay Pacific, Emirates, Etihad Airways, Lufthansa, Qatar Airways and Singapore Airlines.