'Grimm': Jessica Tuck, formerly of 'True Blood,' to guest star

Looks like someone is embracing her inner creepiness. Former "True Blood" cast member Jessica Tuck is set to join "Grimm" in an upcoming episode.

EW.com is reporting that Tuck will play Adalind's (Claire Coffee) Hexenbiest mother in a episode titled "Love Sick." While it probably won't deliver any immediate answers about Adalind, it will certainly give us more information.

In addition to her run as Nan Flanagan on "True Blood," Tuck was a series regular on "Judging Amy." She has also worked extensively on "Days of Our Lives" and "One Life to Live."

So Zappers, are you excited about this casting news?