Elon Musk looks carefree as he enjoys a boat day in Mykonos with pal Sarah Staudinger

He recently revealed that he’s fathered ten children with three different women. 

And on Friday, Elon Musk, 51, looked carefree as he enjoyed a boat day with his pal Sarah Staudinger and her new husband, Endeavour CEO Ari Emanuel, while holidaying in Mykonos, Greece. 

The multi-millionaire businessman arrived at the popular Greek island with a group of friends, including Sarah, who sported a stunning yellow ensemble.

The founder of SpaceX and Tesla CEO kept things casual in a plain green/grey T-shirt and black swim shorts, with a classic pair of aviator shielding his eyes.

Meanwhile, his pal Sarah commanded attention in a skimpy cross over yellow bikini top teamed with a matching slinky skirt. 

The American fashion designer flaunted her washboard abs in the colourful co-ord set and finished her look with a stylish beach bag and cat-eye shades. 

Elon and his friends enjoyed a meal at the Spilia Seaside Restaurant before taking in the sights of the picturesque island on their private boat.

Fun with friends: The multi-millionaire businessman arrived at the popular Greek island with a group of friends, including the mystery brunette dressed in yellow

Gorgeous: Sarah commanded attention in a skimpy cross over yellow bikini top teamed with a matching slinky skirt

Chatty: Sarah was seen socialising with the Tesla CEO during the outing 

Keeping it casual: The founder of SpaceX and Tesla CEO kept things casual in a plain green/grey T-shirt and black swim shorts, with a classic pair of aviator shielding his eyes

Jokers: The group all smiled as they shared a laugh while heading on to shore

Stunning: Sarah – who tied the knot with Ari last month – appeared to be in great spirits as she chatted to Elon

Back in March, it was reported that Elon was in an ‘on-off’ relationship with Australian actress Natasha Bassett, 27, after meeting on the Los Angeles social scene.

Confidential reported that the pair, who were spotted disembarking Elon’s private jet after his plane touched down in Los Angeles in February, have known one another for some time. 

‘Elon and Natasha have been in an on-again, off-again relationship for a few years,’ an alleged source told Confidential. 

‘I think their relationship is quite tumultuous, especially with him having the same sort of on-again, off-again type of relationship with Grimes.’ 

Daily Mail Australia reached out to Elon Musk for comment. 

Well-positioned: Sarah enjoyed chats with Elon during the sun-soaked outing 

Happy days: The Tesla boss looked delighted to be chatting with his pal Sarah

Wow! The American fashion designer flaunted her washboard abs in the colourful co-ord set

Glam: Sarha was glammed up to the max for the day in Mykonos

In May, Elon and Natasha were spotted enjoying a meal at the Cheval Blanc hotel in St Tropez, where rooms cost upwards of $1,300-a-night.

And at the time, it appeared she had been well and truly embraced by Elon’s family, attending multiple events in Cannes where his model mother Maye was also a guest.

The pair ate thought to have attended the premiere of Bassett’s new film, Elvis. She plays one of the singer’s girlfriends in the biopic.

The actress moved to the US from Australia when she was 19. She first worked in New York then traveled to L.A. It’s unclear how she and Musk met. 

Yes! Elon threw his hands up in the air as they sailed over to the island

Hopping off: Elon eagerly followed the Sarah off their tender as they continued their day out

Packing it away: Elon tidied up before they got off the small boat

Fun times: The Tesla CEO looked happier than ever while holidaying in Mykonos

Easy breezy: Elon looked relaxed during the sunny day out in Greece

Earlier this month, Elon tweeted: ‘Doing my best to help the underpopulation crisis,’ he intoned. ‘A collapsing birth rate is the biggest danger civilisation faces by far.’

He added: ‘I hope you have big families and congrats to those who already do!’

His tweet came as it emerged that, last November, he quietly welcomed twins with Shivon Zilis, 36, a senior executive at one of his companies.

Furthermore, they arrived just a few weeks before Musk had a second child via surrogate with his on-off girlfriend Claire Boucher, alias Canadian pop star Grimes.

Strike a pose! Sarah appeared to be in jovial form as she flashed a peace sign while a friend took a snap

Stylish: The brunette babe finished her look with a stylish beach bag and cat-eye shades as she stepped off the boat with her husband Ari

Centre of attention: Unsurprisingly Elon commanded attention during his day out

Adventure time: The group were taken about for a meal before having a tour on the boat

Musk’s two children with Grimes are two-year-old son X Æ A-Xii (pronounced ‘X-Ash-A-12’) and seven-month-old Exa Dark Sideræl. They are known as X and Y for short. 

The Tesla mogul also has five children with his first wife, Canadian author Justine Musk.

A sixth child, their first, died of sudden infant death syndrome aged ten weeks in 2002, prompting them to use in vitro fertilisation. Then Justine gave birth to twins — Vivian and Griffin — in 2004, followed by triplets — Kai, Saxon and Damian — in 2006.

A case of the ex? Back in March, it was reported that Elon was in an ‘on-off’ relationship with Australian actress Natasha Bassett, 27  (Pictured together in France on May 26)

La vie en rose! In May, Elon and Natasha were spotted enjoying a meal at the Cheval Blanc hotel in St Tropez, where rooms cost upwards of $1,300-a-night