Five Things to Know About Billionaire Elon Musk

Amber Heard, 30, was recently spotted at the same Miami Hotel as billionaire Elon Musk, 45, and while speculation arose that the two might be a new couple, a source tells PEOPLE they are "just friends and have been for a few years."

Besides sharing the same taste in hotels, the two are also each going through a divorce. Musk recently split from his wife, actress Talulah Riley, while Heard is famously in the midst of a contentious break up with Johnny Depp.

So just who is Heard's billionaire buddy? Read on to learn more about the tech guru who inspired a famous movie character.

1. He has an estimated net worth of $12.5 billion.



According to Forbes, Musk is number 94 on the list of world billionaires and 37 in the U.S. as of July 22. His fortune is largely self-made through the companies he has founded and runs.

2. He's in the midst of his second divorce from his second wife.

Musk married Riley for the first time in 2010 shortly after divorcing his first wife, Justine. The couple was married for two years before divorcing in 2012.

But the separation didn't last long and they married again in July of 2013. But this was short-lived as Musk filed for a second divorce on New Year's Eve in 2014 before withdrawing the request. Finally, the actress filed one last time in March of this year to end things.

3. He is best known for founding Tesla Motors and SpaceX.

In 2002, Musk started SpaceX in his desire to launch a project that sent an experimental greenhouse to Mars. In 2012, the company launched a rocket that would send the first commercial vehicle to the International Space Station. Musk is also the man behind Tesla Motors, the car company that designs, manufactures, and sells electric cars.

4. After a heartbreaking tragedy, he became the father of five sons.

Musk's first son with Justine died tragically of SIDS at 10-weeks-old in 2002. According to a letter Justine wrote for Marie Claire, "Nevada went down for a nap, placed on his back as always, and stopped breathing," she writes. "By the time the paramedics resuscitated him, he had been deprived of oxygen for so long that he was brain-dead. He spent three days on life support in a hospital in Orange County before we made the decision to take him off it."

The couple then went on to have five more sons through IVF treatment, a set of twins and a set of triplets. Justine reveals in the letter that she is now estranged from Musk and share custody of children.

5. Robert Downey Jr.'s Iron Man character is loosely based on him.

Writing for 2010's Time 100 Most Influential list, the film's director, Jon Favreau, talked about how Tony Stark borrows from Musk and his life. Downey himself suggested Favreau talk to Musk to help develop the Stark character.

"Downey was right," Favreau concedes in the dedication. "Elon is a paragon of enthusiasm, good humor and curiosity — a Renaissance man in an era that needs them."