Tun Dato' Seri Haji Abdullah bin Haji Ahmad Badawi (Jawi: عبد الله بن حاج احمد بداوي; born 26 November 1939) is a Malaysian politician. He was the Prime Minister of Malaysia from 2003 to 2009. He was also the President of the United Malays National Organisation (UMNO), the largest political party in Malaysia.