Jenna Elfman announced via Instagram Wednesday she will appear in "The Walking Dead"-"Fear the Walking Dead" crossover event.

"So honored to be part of this. #ftwd @feartwd @scottmgimple #twd @amcthewalkingdead," the "Dharma & Greg" alum posted Wednesday without elaborating about who she will play or how the character fits into the franchise's mythology.

Her message accompanied a poster that reads, "The Worlds Collide," with both shows' logos underneath the words.

"The Walking Dead" creator Robert Kirkman confirmed last month at New York Comic Con that a character from one of his series would appear on the other show, even though the zombie-apocalypse dramas take place on different timelines and on opposite sides of the United States.

No airdate or other details about the crossover have been revealed.