Sheen has hired family law attorney Mark Gross, a rep for the lawyer confirms to E! News.
While Gross declined to comment on his client further, the partner at Brot & Gross was once a member of the Divorce Magazine advisory board.
Mueller reportedly has lawyered up as well, hiring Lori Howe at Trope and Trope, which practices family law exclusively.
Of course, Galanter has issued a "no comment" regarding Howe.
He also tells E! News that he has not yet reviewed the alleged Sheen prenuptial agreement posted on Gawker.com and therefore cannot comment on its accuracy.
—Reporting by Lindsay Miller and Aly Weisman
Ah, the good ol' days!