Michelle Obama's first conversation with Richard Branson since her husband's presidency ended was about how liberated she felt after leaving the White House, according to Branson's new autobiography.

"We're free!" Michelle Obama told Branson as she and her husband, former President Barack Obama, greeted the British entrepreneur ahead of a 10-day stay with him in the British Virgin Islands in January.

Branson, who owns Necker and Moskito Islands in the archipelago, said the former first couple disposed with formalities for the entirety of their vacation, insisting that staff used their given names and throwing them a thank you party on the final night of their holiday.

"It's so nice to have my name back after eight years," Michelle Obama told Branson, according to his book, Finding My Virginity.

Branson also detailed the backstory to the widely circulated image of Barack Obama grinning on a vessel after a day of kitesurfing, the first time the 44th president had enjoyed water sports since his inauguration.

"At the end of the thrilling kitesurfing session, he was standing shirtless at the back of the boat with an invigorated look on his face, muscles bulging and eyes beaming," Branson wrote. "I looked at him and thought: ‘Eat your heart out, Putin!'"

Branson added that when he asked the former president whether he was "hopeful" about the future, he responded that he was "a more glass half-full type of person" whereas his wife had "more of a glass half-empty attitude."

"While all the news coming out of the U.S. was about Trump trying to dismantle all Barack had worked so hard for, his attitude was just to get on with his life, have a well-deserved holiday and recharge ready to work," Branson continued.