According to FOX Chicago, an Illinois judge finalized the couple's divorce in December, paving way for Balfour's murder trial.
Balfour did not fight the divorce, instead allowing it to proceed smoothly.
Balfour goes on trial for killing Jennifer Hudson's mother, brother and nephew April 23.
Jury selection was completed last week.
As previously reported, Jennifer Hudson and Julia Hudson may testify during the trial. Balfour is alleged to have threatened Julia Hudson numerous times, claiming she would be the last to die after he killed her family.