Meltek Sato Kilman Livtuvanu (born 30 December 1957) is a Vanuatuan politician who served as the Prime Minister of Vanuatu on four previous occasions, most recently from 4 September to 6 October 2023. he was previously prime minister from December 2010 to April 2011, from May to June 2011 and June 2015 to February 2016, though his premiership was subsequently annulled by a court of law.

Kilman was elected prime minister again on 26 June 2011, thus beginning his first legally recognised term in the premiership; he served until 23 March 2013.

In December 2004, Kilman filed the no confidence motion which deposed Vohor and made Lini prime minister.

[11] On 16 June, Chief Justice Vincent Lunabek ruled in a separate case put forward by Edward Natapei, contesting the constitutionality of Kilman's initial election in December 2010.

Kilman refused to comment publicly during the case, and allowed convicted MPs to remain in their positions as government ministers right up until the point of their imprisonment.

His perceived lack of leadership during the crisis, and refusal to take responsibility for corruption within his government, was widely criticised and led to calls for his resignation.

Kilman told fellow MPs his top concern would be to "review foreign policy so that it benefitted Vanuatu more", also seeking "new export markets".

The prime minister election came as a result of a political crisis, leading to former PM Kalsakau's ousting "for actions including signing a security pact with Australia".