Gabrielle Union has joined the cast of Lifetime’s previously greenlighted “Army Wives” spinoff.

The spinoff, which will be produced as an episode of “Army Wives,” centers on the character of Pamela, played by Brigid Brannagh (Daily Variety, May 10).

In the potential new series, Pamela — a former police officer whose husband was a Delta Force soldier — is now divorced and back in her old job as an Atlanta cop. Union will play her partner, Det. Gina Holt.

Pamela’s divorce is a major part of the fourth season of “Army Wives,” which launched April 11.

“Army Wives” scribes Bruce Zimmerman and T.D. Mitchell are attached to create the new series. ABC Studios and the Mark Gordon Co., which produce “Army Wives,” are also behind the spinoff. Gordon and Deb Spera are exec producers, as is Jeff Melvoin.

Spinoff is one of several Lifetime development projects based in the South.

Union hasn’t had much luck on the small screen front, having appeared most recently in two short-lived series, “FlashForward” and “Life.” Her other credits include “Night Stalker” and “City of Angels.”

In the features world, Union’s credits include “Bring It On” and “Daddy’s Little Girls.”

“Army Wives” bowed to strong numbers on Lifetime in June 2007 and continues to perform decently for the cabler.