A deputy prime minister or vice prime minister is, in some countries, a government minister who can take the position of acting prime minister when the prime minister is temporarily absent. The position is often likened to that of a vice president, but is significantly different, though both positions are "number two" offices. The position of deputy prime minister should not be confused with the Canadian office of the Deputy Minister of the Prime Minister of Canada, which is a non-political civil servant position (Nor does the Deputy Prime Minister of Canada act as a "number two"). The states of Australia and provinces of Canada each have the analogous office of deputy premier. In the devolved administrations of the United Kingdom, an analogous position is that of the deputy first minister.

A deputy prime minister traditionally serves as acting prime minister when the real prime minister is temporarily absent or incapable of exercising his/her power. For this reason the deputy prime minister is often asked to succeed to the prime minister's office following the prime minister's sudden death or unexpected resignation, although this is not necessarily constitutionally mandated.

Curtis Warren Pitt (born 1 February 1977) is an Australian politician who has been a Labor member of the Legislative Assembly of Queensland since 2009, representing the district of Mulgrave.

Pitt was born and raised in Gordonvale in Far North Queensland. He completed his secondary education at St Mary’s College in Woree. He has a Bachelor of Arts (Politics) from James Cook University.

His father, Warren Pitt, was the member for Mulgrave from 1989 to 1995, when he was defeated by the National Party's Naomi Wilson, and again from 1998 to 2009.

Prior to announcing his intention to run for parliament, Pitt was head of the Queensland Government's Indigenous Jobs and Enterprises Taskforce. He had previously led the government's business and skilled migration program. He was elected to the seat of Mulgrave, standing for the Labor Party, at the 2009 state election with a 48.51% primary vote and a two-candidate preferred vote (2CP) of 58.08, and was appointed to the Bligh Ministry in the February 2011 reshuffle as Minister for Disabilities, Mental Health and Aboriginal and Torres Strait Islander Partnerships. He was re-elected at the 2012 state election, albeit with his primary vote down 14.51 percentage points and his 2CP share reduced to 51.45%. Following the election, which resulted in a severely reduced caucus of seven members, Pitt was appointed Leader of Opposition Business and given the following Shadow Ministerial portfolios: Treasury and Trade; Energy and Water Supply; Main Roads; Aboriginal and Torres Strait Islander Partnerships, Sport and Recreation. These appointments could change if Jackie Trad is declared the winner of the South Brisbane by-election as she will likely be given a share of the party's portfolios.