Marriott International Inc announced an agreement to buy competitor Starwood Hotels and Resorts in a $12.2-billion transaction that will create the world's largest hotel chain.

Starwood stockholders would receive 0.92 Marriott Class A share and $2 in cash for each share, Efe cited the companies as saying in a joint statement.

The combined company will be the world's largest hotelier, with 1.1 million rooms in more than 5,500 facilities across over 100 countries and an annual turnover of $2.7 billion.

The deal, subject to approval from both companies' shareholders and regulators, is expected to close by mid-2016, said the statement.

Marriott CEO Arne Sorenson will head the combined company, whose headquarters will remain in Bethesda, Maryland. Three Starwood directors will join an expanded 14-member board.