The cabinet of Thailand or, formally, the Council of Ministers of Thailand (Thai: คณะรัฐมนตรี; rtgs: Khana Ratthamontri) is a body composed of thirty-five of the most senior members of the government of the Kingdom of Thailand. The cabinet is the primary organ of the executive branch of the Thai government. Members of the cabinet are nominated by the prime minister and formally appointed by the King of Thailand. Most members are governmental department heads with the title of "minister of state" (Thai: รัฐมนตรี; rtgs: Ratthamontri). The cabinet is chaired by the prime minister of Thailand. The cabinet is often collectively called "the government" or "the Royal Thai Government".
Prior to the Revolution of 1932, the absolutist Chakri kings ruled Siam through a series of "krom" (Thai: กรม) and "senabodi" (Thai: เสนาบดี). On 15 April 1874 King Chulalongkorn founded the King's Privy Council (Thai: สภาที่ปรึกษาในพระองค์) (which still exists today) made up of 49 senior princes and officials. For the first time the kings of Siam exercised his powers through a council.