When the couple first split in January 2012, Musk tweeted: “It was an amazing four years. I will love you forever. You will make someone very happy one day.”
This time, Musk, 43, filed for divorce from his 29-year-old wife in the Los Angeles County Superior Court on New Year’s Eve. The couple put out a joint statement saying they are splitting amicably.
The couple first married in 2010, divorced two years later, and were re-married after 18 months in July 2013. They have no children together, but Musk has five sons from a previous marriage.
Billionaire Musk, who founded online payment system PayPal, owns electric car company Tesla and also the private aerospace company SpaceX, has agreed to give Riley $16 million (£10.3 million) in cash and other assets as part of a financial settlement, the couple said in their statement.
The divorce filing said property would be split based on a prenuptial agreement.
Riley, who has appeared in Pride & Prejudice, Inception and St Trinians, has been writing and directing a feature film in the UK, called Scottish Mussell for the last five months, during which time the couple had been living apart.
Additional reporting by APReuse content