Amazon founder Jeff Bezos and his wife, MacKenzie Bezos, are divorcing after 25 years of marriage—proving, yet again, that the lives of the rich and famous aren’t as picture-perfect as they may seem.

Jeff made the announcement early Thursday morning when he released the following statement on Twitter:

We want to make people aware of a development in our lives. As our family and close friends know, after a long period of loving exploration and trial separation, we have decided to divorce and continue our shared lives as friends. We feel incredibly lucky to have found each other and deeply grateful for every one of the years we have been married to each other. If we had known we would separate after 25 years, we would do it all again. We’ve had such a great life together as a married couple, and we also see wonderful futures ahead, as parents, friends, partners in ventures and projects, and as individuals pursuing ventures and adventures. Though the labels might be different, we remain a family, and we remain cherished friends.

The message was signed as being from both Jeff and MacKenzie. The reason for the couple’s split remains unknown.

Jeff, 54, and MacKenzie, 48, met and got married in the ’90s while working at a New York-based hedge fund. Not long after, they moved to Seattle, where Jeff launched Amazon.

According to Bloomberg Billionaires Index, Jeff is now the richest person in the world. His estimated net worth is $137 billion.

MacKenzie is a published author. She’s written multiple novels, including Traps and The Testing of Luther Albright.

The couple has four children together: three biological sons and a daughter adopted from China.

Despite being the world’s wealthiest couple, Jeff and MacKenzie’s impending divorce is evidence that no amount of money can save a failing marriage.