BREAKING: Elon Musk will be part of Donald Trump's White House cabinet as billionaire's role named

The world's richest man Elon Musk will be part of Donald Trump's White House cabinet, the incumbent president has confirmed tonight.

Trump has named the billionaire's role in government efficiency with a unique new title, revealing the Tesla, X and SpaceX owner is to work with former presidential candidate Vivek Ramaswamy in heading the department of government efficiency.

The Teflon Don claimed the duo "will pave the way for my administration to dismantle government bureaucracy, slash excess regulations, cut wasteful expenditures, and restructure federal agencies".

Trump wrote on social media: "A smaller government, with more efficiency and less bureaucracy, will be the perfect gift to America on the 250th Anniversary of The Declaration of Independence. I am confident they will succeed!"t

Musk endorsed Trump for president weeks ahead of his election win and appeared at several rallies and campaigns, becoming a prominent feature in the run-up to the November 5 election.

Musk is already understood to have joined Trump's call with Ukrainian President Volodymyr Zelenskyy, according to a Ukrainian official with direct knowledge of the phone call, reports .

The person, who remained anonymous, said Zelenskyy and Musk spoke during the call with Trump, but that Musk did not appear to be on the line for the entire conversation on Wednesday.

Trump seemingly handed his phone over to Musk and the Ukrainian president thanked the SpaceX owner for assisting his country with access to the Starlink satellite internet platform.

Musk has become a close ally of the President-Elect over the last year, running much of the ground game for Trump through his America PAC, to which he has given significant amounts of money.

The America PAC is a super political action committee created by Musk with the backing of a number of prominent tech businessmen to support Donald Trump's 2024 presidential campaign.

The presence of Musk on the call highlights his influence in the president-elect’s circle. Trump has mused that Musk could have a formal role in his administration that focuses on government efficiency, raising questions about potential conflicts of interest given SpaceX’s lucrative government contracts.