"Rolls-Royce has been selected by Singapore Airlines Group to power 50 Boeing 787 Dreamliner aircraft with Trent 1000 engines," it revealed in a statement.
"The announcement, which includes long-term TotalCare service support, is worth USD 4.0 billion at current list prices."
Rolls-Royce added that 30 Boeing 787-10X aircraft will be operated by Singapore Airlines.
The airline's subsidiary, Scoot, will operate 10 Boeing 787-8 and 10 Boeing 787-9 aircraft.
Singapore Airlines and Scoot currently operate a total of 88 Rolls-Royce powered aircraft, with 88 more on the order books.
"This decision is a tremendous reflection of the deep relationship that Rolls-Royce and Singapore Airlines enjoy, and allows us to continue to develop our strategic alignment.