Katherine Helmond Sinks Her Teeth Into ‘True Blood’

“Soap” and “Who's The Boss” actress will play Caroline Bellefleur

Whoa! Mona from "Who's the Boss?" is getting vampy.

Veteran actress Katherine Helmond will have a guest-starring role on for Season 4 of "True Blood" as Caroline Bellefleur, the grandmother of Andy and Portia Bellefleur, HBO confirms to TheWrap.

Also read: "True Blood" Season 4 Sneak Peek: Domestic Squabbles and "Vam-Pops" (Video)

Helmond will have a two-episode run on the series, starting with episode 4 of the new season, which premieres on June 26.

In addition to her role on "Who's the Boss?" the 82-year-old actress is known for her portrayal of Debra Barone's mother Lois on "Everybody Loves Raymond" and ditzy matriarch Jessica Tate on ABC's 1970s series "Soap."