Billie Lourd's Will & Grace character revealed: She'll play her grandma Debbie Reynolds' character's granddaughter

Deadline

The late Debbie Reynolds played Bobbi Adler, the mother of Debra Messing's Grace Adler, on the NBC comedy. Lourd will guest-star as Grace's niece, Fiona Adler, and granddaughter of Bobbi (and daughter of Grace's older sister, who was portrayed by Mary McCormack). “The episode is especially meaningful because of Billie’s relationship to the show,” says Will & Grace co-creator/executive producer Max Mutchnick. “We’re thrilled to have Billie. And best of all — she’s really good.”