Brook filed the docs in L.A. County Superior Court this month against husband Christopher Warren, citing irreconcilable differences. The couple married 22 years ago, but separated in 2009.
Fun fact: the couple only has one son ... 22-year-old Chris Warren Jr. ... who starred in all three "High School Musicals."
Fun fact #2: Brook was originally cast as Tara in "True Blood," but was eventually replaced by Rutina Wesley.
What were we talking about again?