The title for the upcoming sequel to 'Wall Street' is 'Money Never Sleeps,' and star Michael Douglas is learning the hard way just how true those words are.

Douglas is being sued by his ex-wife, Diandra Douglas, who is claiming that she is entitled to 50 percent of his earnings from the upcoming 'Wall Street: Money Never Sleeps' as part of her divorce settlement from the actor, according to the New York Post. Michael and Diandra divorced in 2000, and he is currently married to actress Catherine Zeta-Jones, with whom he has two children, Dylan, 9, and Carys, 7.