Exclusive: Visiting America's Vanessa Bell Calloway to Guest-Star in Ringer Finale

NBC's Up Through The Night just hired another Happy Days veteran. Following a casting of Henry "The Fonz" Winkler as Ava's (Maya Rudolph) father, Marion "Mrs. C." Ross will have Chris's (Will Arnett) Grammy.Marion's grandmother character is referred to in my experience as "a brittle, bitter lady who's much less fond ... Find Out More > Other Links From TVGuide.com Marion RossUp Through The Night