The world's richest man on Thursday met the Pope at the Vatican, posting a photo of the encounter to Twitter

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

'Honored to meet @Pontifex yesterday,' he tweeted, and when one person remarked about his ill-fitting suit Musk admitted it was 'tragic'

Elon Musk has broken his nine day Twitter silence to share a surprise visit to see Pope Francis with four of his seven children - and even joked about his ill-fitting suit. 

'Honored to meet @Pontifex yesterday,' Musk tweeted on Friday evening. He brought along four of his five teenage children for the encounter at the Vatican in Rome. 

His fifth teen, previously known as Xavier, announced last month she's now a transgender woman called Vivian Jenna Wilson, and that she no longer wishes to be associated with her billionaire dad. 

Musk also conceded that the black tailored outfit he was wearing was not befitting of the occasion, replying to a Twitter user who mocked it by answering: 'My suit is tragic.'

Musk has spoke of being an atheist, so it is unclear why he decided to meet the pope, and what the two men discussed.