Well, this is unexpected.
Legacies Season 1 Episode 6 is bringing back Jodi Lyn O'Keefe as Jo.
Alaric's one-time love and the mother of Lizzie and Josie was killed in brutal fashion by Kai on The Vampire Diaries Season 6 Episode 21.
The character subsequently popped up on The Vampire Diaries Season 7 when Alaric managed to bring her back from the dead.
However, it was not the Jo he knew and loved. We did get a glimpse of Jo on The Vampire Diaries Season 8 Episode 16, and she was apparently at peace watching Alaric and their daughters moving on.
But now she's back in the land of the living, and it's going to cause a lot of problems.
Have a look at the photos below, and be sure to hit the comments with your theory on what brings Jo back.
Remember you can watch Legacies online right here via TV Fanatic.