Elon Musk is among the opening speakers who will precede President-elect Donald Trump at his pre-inaugural rally in Washington, D.C., on Sunday, according to a source familiar with the planning.

Musk, the world’s richest man, spent more than a quarter-billion on last year’s campaign. Soon after his victory in November, Trump tapped Musk to co-chair an outside advisory committee dubbed the “Department of Government Efficiency,” or “DOGE,” that is aimed at dramatically slashing government spending, regulations and the federal workforce.

Others who will speak ahead of Trump’s evening address at the Capitol One Arena include Ultimate Fighting Championship CEO Dana White — who was recently named to the Facebook board — Vice President-elect JD Vance, retired professional wrestler Hulk Hogan, conservative media personality Megyn Kelly and top Trump aide Stephen Miller.

Members of Trump’s immediate family will also be speaking at the rally. There will be performances from Kid Rock, Billy Ray Cyrus and The Village People, the creators of “Y.M.C.A.” — the anthem of Trump’s rallies. Puerto Rican musical artist Anuel AA will also be in attendance at the rally, but he will be speaking rather than performing.

A Trump transition spokesperson did not immediately respond to a request for comment from NBC News. The rally program is slated to begin at 3 p.m. E.T. on Sunday, according to a sign-up page on Trump’s inauguration website.

Musk and other tech executives are expected to sit on the dais at the inauguration with Cabinet picks, elected officials and other notable guests.