“Party Down” will be back on Starz in the spring, and it’s bringing another round of guest stars along for the ride.

The show about L.A. cater-waiters will premiere on April 23, where it will be paired with Starz’s new show “Gravity.” Season 2 will pick up a few months after the end of the first season, with Henry (Adam Scott) now in charge of the Party Down team, Casey (Lizzy Caplan) back from her cruise-ship gig and Ron (Ken Marino) having gone off the deep end after his Soup R’ Crackers dream disintegrates.

The show will also feature new regular Megan Mullally as Lydia Dunfree, a new member of the catering crew who’s moved to Los Angeles in an attempt to make her 14-year-old daughter a star. She takes over for “Glee’s” Jane Lynch, who’ll return for the season finale as her character, Constance, gets married.

Other guests this season include Christopher Mintz-Plasse (“Superbad”), Steve Guttenberg (“Veronica Mars”) and Thomas Lennon (“Reno 911″). Joey Lauren Adams and J.K. Simmons, who guested last season, will return, as will Kristen Bell as rival caterer Uda, who’s now dating Henry.

“Gravity” stars Ivan Sergei, Krysten Ritter, Ving Rhames and Rachel Hunter as people who attempted suicide but survived and meet in a support group. Eric Schaeffer (“Starved,” “If Lucy Fell”) and Jill Franklyn (“Seinfeld,” “It’s Like, You Know”) created the series.