he new ABC drama “Mistresses” is now in pre-production and Mary Jo Slater is casting recurring, guest starring, and day player roles. The series was created by Gossip Girl writer K.J. Steinberg, based on the hit BBC series of the same name. ABC picked up “Mistresses” as a 12 episode midseason order. In addition to acting roles, extras of all ages and types will be cast throughout the season. Shooting begins on August 7, 2012 in Los Angeles. The show follows four friends as they try to deal with complex relationships and toward a sense of order and enlightenment in their lives.

“Mistresses” stars Alyssa Milano (“New Years Eve,” “Romantically Challenged,” “Hall Pass,” “My Name Is Earl,” “Charmed,” “Melrose Place”) as Savannah, Yunjin Kim (“Lost”) as Karen, Rochelle Aytes (“Work It,” “White Collar,” “Detroit 1-8-7,” “Desperate Housewives”) as April, Jes Macallan (“Kiss Me,” “NCIS: Los Angeles,” “Crash and Burn,” “Grey’s Anatomy,” “Shameless”) as Josslyn, Jason George (“Grey’s Anatomy,” “The Closer,” “Against the Wall,” “Castle,” “Off the Map,” “Eastwick”) as Dominic, Brett Tucker (“Castle,” “Spartacus: Vengeance,” “Rizzoli & Isles,” “NCIS,” “Neighbours”) as Harry, Erik Stocklin (“Grey Sheep,” “Sick Day,” “Let’s Big Happy”) as Sam.

Based on the U.K. television series, “Mistresses” is from K.J. Steinberg (“Gossip Girl”) and is executive-produced by Robert Sertner (“Revenge,” “No Ordinary Family”), K.J. Steinberg (“Gossip Girl”), Rina Mimoun (“Privileged,” “Gilmore Girls”) and Douglas Rae (“Wuthering Heights,” “Camelot,” “Mistresses,” “Raw,” “Meadowlands”). The pilot for “Mistresses” is directed by Cherie Nowlan. The series is from ABC Studios.

Details on how talent can submit for acting roles, and registration information for extras can be found on the following casting post here.