There was speculation the Treasurer would leave his current role, although on Friday Ms Palaszczuk refused to comment on whether Deputy Premier Jackie Trad would take his position.

Ms Palaszczuk said Mr Pitt would bring his diligence, fairness and attention to detail to the role of Speaker.

"Curtis Pitt is well-versed in the Parliamentary and legislative process. They will be crucial qualities in the new Parliament," she said.

Attorney-General Yvette D'Ath, Racing Minister Grace Grace and Environment Minister Steven Miles will also be promoted for "strong performance" in the first Palaszczuk term, when the new cabinet is sworn-in at Government House on Tuesday.

Ms Palaszczuk said Mr Pitt had handed down three surplus budgets, was one of Labor's most experienced and senior MPs and would continue to play a leadership role in the far north.

Mr Pitt said he was honoured to accept his party's nomination as Speaker.

"It's an honour to be nominated to a position last held by a member from far north Queensland a century ago," he said.

"Former speaker William McCormack was not only from FNQ as well, but at 36, he also took on the job at a relatively young age."

"I have always been willing to serve Queenslanders in any capacity, both in government and opposition."

Mr Pitt said it was rewarding to serve as a cabinet minister in a range of demanding portfolios in two governments.

"I see my role as ensuring that the Parliament will continue to be a house of robust debate, and that its operations are fair and accountable," he said.

"If elected, the role of Speaker opens a new and challenging chapter in my public life."

The previous speaker, independent MP Peter Wellington, retired at the November 25 election.

Labor won 48 seats in the election, giving it a two-seat majority, with the LNP on 39, and one independent, three Katter's Australian Party MPs, one One Nation MP and one Greens MP.

After an election, the Legislative Assembly chooses a new Speaker via a ballot - if Labor has a majority, their pick will succeed.

The Speaker presides over the Parliament, and if a vote is tied, the Speaker has the casting vote.