Now that pilot season is wrapping up, it's casting season in L.A., where mega-stars or yet-to-be-discovered actors sign on to all sorts of new shows in hopes that the networks will pick them up for the fall line-up. There are a lot of big names this time around. Check it out:

• Calista Flockhart (Ally McBeal) and Rachel Griffiths (Six Feet Under) will star in the ABC drama pilot Brothers & Sisters, a soap-style drama about adult siblings.
• Heather Locklear is in negotiations for a leading role in the ABC comedy pilot, Women of a Certain Age. Locklear would play a recently widowed woman who starts a new life with her two best friends.
• Ron Livingston (Sex and the City, Office Space) is one of two leads in a FOX drama called Primary, which is about a male and a female hostage negotiator who balance their love lives with their jobs.
• Joe Pantoliano (The Sopranos) has agreed to star in CBS' Waterfront, as the charismatic and "ethically-challenged" mayor of Providence, R.I.
• Steven Culp, previously known as Rex Van De Kamp on Desperate Housewives, will appear in the ABC drama, Traveler, about three Yale graduate students who become a national security risk when one of them frames the other two for an art museum bombing.
• Swoosie Kurtz will take on a supporting role in the CBS comedy, Play Nice, which stars Timm Sharp and Sara Rue (Less Than Perfect) as a brother and sister who run a toy company.
• Jonah Lotan, who has been playing Spenser Wolff this season on 24, will take on a role on the FOX thriller, Beyond, which is about the space race.

[Via The Hollywood Reporter]