British Airways is to use its first Boeing 787-10 on services to the US city of Atlanta, following delivery of the twinjet in January.
The Oneworld carrier says the 787-10 will be configured in four classes, with eight first-class seats and a 48-seat business cabin.
These will be complemented by 35 seats in premium economy and 165 in economy.
British Airways has disclosed that the initial 787-10 will be delivered in January 2020. It has 12 of the type on order, powered by Rolls-Royce Trent 1000 engines, following a deal in December 2013.
Chief executive Alex Cruz says the aircraft will be another "significant milestone" in the carrier's fleet and customer investment programme.
"It will also offer greater comfort for our customers, as it features our latest generation seats in all cabins," he adds.
Six of the 787-10s will be delivered next year. They will complement the airline's 12 787-8s and its 16 787-9s.