Incoming First Lady Melania Trump has accused Barack and Michelle Obama of withholding information from her husband when he first moved into the White House.

With neither president revealing what the pair spoke about, speculation has mounted about the details of their conversation.

Michelle and Barack Obama made Melania and Donald Trump's first move into the White House 'challenging,' the former model revealed in a new interview

Other former presidents and first ladies are expected to attend as are tech billionaires Elon Musk, Mark Zuckerberg and Jeff Bezos.

The former president and once-again-future president, who are historically something less than besties, chatted it up before the service began. (Michelle Obama was not in attendance.)

Donald Trump shook hands with Mike Pence at Jimmy Carter's state funeral -- a notable exchange as the two men have not interacted publicly in years.

Former Presidents Barack Obama, Bill Clinton and George W. Bush will come together again next week for the inauguration of President-elect Donald Trump, but one spouse, Michelle Obama, is sitting this one out.

Soon-to-be First Lady Melania Trump on Monday said the 2016 transition was 'challenging,' citing actions by the Obama administration.