'''Kuala Lumpur''' (), officially the '''Federal Territory of Kuala Lumpur''' () and colloquially referred to as '''KL''', is a federal territory and the capital city of Malaysia. It is the largest city in Malaysia and only in Peninsular Malaysia, covering an area of  with an estimated population of 1.73 million . Greater Kuala Lumpur, also known as the Klang Valley, is an urban agglomeration of 7.564 million people . It is among the fastest growing metropolitan regions in Southeast Asia, in both population and economic development.