Look who's joining Kirstie Alley (search). The former "Cheers" actress will be accompanied by John Travolta (search), who was featured with Alley in the "Look Who's Talking" films, in her upcoming Showtime series, "Fat Actress."

The seven-episode, unscripted comedy series won't debut until March, but the cable network has revealed several guest stars slated to step inside Alley's hyper-reality world.

In the series, Alley plays a fictionalized version of herself, a TV and movie actress whose growing weight problem has been well documented in supermarket tabloids. Each "Curb Your Enthusiam"-like episode emanates from a story outline with the actors largely improvising the dialogue.

NBC Universal TV Group President Jeff Zucker, Mark Curry (Hangin' With Mr. Cooper) and Travolta's actress-wife, Kelly Preston (search), also will guest star on the first episode, Showtime announced last week.

Alley played sassy bar manager Rebecca Howe on the '80s sitcom "Cheers," and later starred in "Veronica's Closet" for three seasons.

Besides the "Look Who's Talking" movies, her films include "For Richer or Poorer" and "Deconstructing Harry."

Alley, 53, also served as the celebrity spokesman for furnishings outlet Pier 1 Imports for three years.