On June 1, Seth Rudetsky's weekly cabaret variety show at NYC's Don't Tell Mama will have a grace-full guest: Megan Mullally, that is, best known for her featured role on TV's "Will & Grace." She'll talk with the host about her TV and film work, as well as her recent West Coast solo, Sweetheart.

Rudetsky, a comedian and writer for Rosie O'Donnell's TV show, hosts his variety show every Thursday at 6 PM. There's a 2-drink minimum, but the $10 cover charge is donated to Broadway Cares/Equity Fights AIDS.

Currently seen on NBC as Karen Walker in "Will And Grace," Mullally made her Broadway debut as Marty opposite Rosie O'Donnell in the 1994 revival of Grease. She returned as Rosemary Pilkington in the 1995 revival of How to Succeed in Business Without Really Trying starring Matthew Broderick. Other television and film credits include "Seinfeld," "Mad About You," "Frasier," "About Last Night" and "Queen's Logic."

Sweetheart, which had an extended run at West Hollywood's Coast Playhouse last fall, was Mullally's exploration of relationships, from both male and female perspectives. Using 12 well-known and obscure story songs, she covered the idea of a "sweetheart" in moods that range from dark to tongue-in-cheek.

For information on "Seth's Broadway Chatterbox" at Don't Tell Mama, 343 West 46th Street, call (212) 757-0788. You can also check their website at : http://www.geocities.com/broadwaychatterbox. Previous guests on "Chatterbox" have included Andrea Martin, Terrence Mann, Marin Mazzie, Kristin Chenoweth, Bebe Neuwirth, Graciela Daniele and Norm Lewis. Upcoming guests include Tony-winner Roger Bart You're A Good Man Charlie Brown) and nominee Kevin Chamberlin (Dirty Blonde) (June 8), and Faith Prince (James Joyce's The Dead) (June 15).

-- By David Lefkowitz