It's a family reunion on Will & Grace.

American Horror Story and Star Wars actress Billie Lourd, Carrie Fisher’s daughter and Debbie Reynolds’ granddaughter, is the latest celebrity guest star to appear in the NBC revival.

As NewNowNext previously reported, Lourd's appearance is particularly special because she plays Fiona, granddaughter of Reynolds' character, Bobbi Adler.

Bobbi, of course, was brought to life by Reynolds in the original run of the series, which aired for eight seasons from 1998 to 2006.

“The episode is especially meaningful because of Billie’s relationship to the show,” Will & Grace co-creator and executive producer Max Mutchnick told Deadline. “We’re thrilled to have Billie. And best of all—she’s really good.”

If you’re confused, Lourd is not playing Grace’s daughter; instead, she plays the offspring of Grace’s older sister, Janet (Mary McCormack), who is reconnecting with her “cool aunt” Grace.

In a description for the new episode, which airs Thursday, February 6, Will and Grace "decide to intervene when they discover Grace’s niece (guest star Billie Lourd) is dating a bisexual man (guest star Peter Graham)."

If Lourd's appearance isn't enough to make you tune in, eternal crush Ryan Phillippe also guests as an object of Jack's affection.

The final season of Will & Grace is truly going out with a star-studded bang.