Mahathir bin Mohamad is a Malaysian politician, author, and physician who served as the fourth and seventh prime minister of Malaysia. He held office from 1981 to 2003 and later from 2018 to 2020 for a cumulative total of 24 years, making him the country's longest-serving prime minister. Before becoming premier, he served as deputy prime minister and in other cabinet positions. He was a member of Parliament for Langkawi from 2018 to 2022, Kubang Pasu from 1974 to 2004, and Kota Star Selatan from 1964 to 1969. His political career spanned more than 75 years, from joining protests opposing citizenship policies for non-Malays in the Malayan Union in the 1940s to forming the Gerakan Tanah Air coalition in 2022.

The prime minister of Malaysia is the head of government of Malaysia. The prime minister directs the executive branch of the federal government. The Yang di-Pertuan Agong appoints the prime minister as a member of Parliament (MP) who, in his opinion, is most likely to command the confidence of a majority of MPs. The Prime Minister is usually the leader of the party winning the most seats in a general election.