(Corrects to show $3.3 bln is for 12 planes only, in first paragraph)
JEDDAH Nov 7 (Reuters) - Saudi Arabian Airlines ordered 12 Boeing 777-300 'Extended Range' (ER) planes for $3.3 billion, with an option for 10 more 777s, the U.S. firm Boeing (BA.N) said on Sunday.
The national carrier, which is in the process of being privatised, also ordered eight Boeing 787 dreamliners for its long- haul fleet but did not give a price for that order.
"Our decision to order the 777-300 ER is part of a long-term growth strategy to expand and modernise our fleet with newer, more fuel-efficient airplanes," said Khaled al-Mulhim, Director General of Saudi Arabian Airlines.
Saudi Airlines has a fleet of over 114 planes, including 35 Boeings and 35 Airbus A320s. The new order will raise the number of Boeing 777 planes in the Saudia fleet to 35.
(Reporting by Asma Alsharif; Editing by Erica Billingham)