Iraq's Government has formally signed for 10 Boeing 787 aircraft, but has yet to disclose an engine selection.
The identity of the customer has been disclosed on Boeing's backlog for 2009.
Boeing's data shows that the order was signed on 22 December.
Iraq is taking the 787-8 variant. A preliminary agreement to take the aircraft was initially revealed two years ago.
Thirty Boeing 737-800s were also part of this agreement. A firm order for these was sealed in April 2008.
While the Iraqi Government is officially listed as the customer, the aircraft are likely to be bound for flag-carrier Iraqi Airways.