A rep for the singer, who scored a string of hits in the 1980s and 1990s, has confirmed the news.
Rhodes appeared in his “Don’t Mean Nothing” music video in 1987, and the couple wed in 1989.
They have three adult sons.
Marx and Rhodes separated last July and are currently in the process of a divorce.
When he appeared on Friday’s “Katie,” Marx acknowledged the split, and Katie Couric declared that he is “back on the market”.