Elon Musk expresses excitement as he visits Pope Francis with his children

SpaceX founder and Tesla chief executive, Elon Musk has expressed his excitement at meeting the head of the Catholic Church, Pope Francis.

The world's richest man on Thursday met the Pope at the Vatican, and posted a photo of the encounter on Twitter.

"Honored to meet @Pontifex yesterday,"

the billionaire tweeted, and when one person remarked about his ill-fitting suit Musk admitted it was 'tragic'.

Musk, 50, was accompanied by four of his five teenage children - all born to his first wife Justine Wilson, a Canadian author

The Tesla boss' visit to the Pope comes a week after his son Xavier legally changed gender from male to female and dropped last name to distance herself from father.