The Prime Minister of the Kingdom of Sierra is the head of Her Royal Highness' Government in Sierra and the leader of the civil wing of the executive branch. Unlike nations with a Westminster-styled parliamentary system, the prime minister of Sierra is directly elected alongside the deputy prime minister (who is selected by the prime minister as his/her running mate during such election) by the general electorate. However, unlike the American presidency, the prime minister is also a member of the legislature branch. In the Parliament, the prime minister is entitled the position of President of Senate by ex officio. The prime minister also serves as a member of the Privy Council. The prime minister serves a four-year term and can be reelected with no term limit.